diff --git a/KeyType/Collection/Custom.swift b/KeyType/Collection/Custom.swift
index f283964..3d04630 100644
--- a/KeyType/Collection/Custom.swift
+++ b/KeyType/Collection/Custom.swift
@@ -12,7 +12,7 @@ let Custom = [
     // To launch Alfred faster
     Remap(Key.shiftR.without.shift, to: Key.SPACE.with.option),
     // Left to 'a' becomes escape
-    Remap(Key.ctrlR.without.ctrl, to: Key.ESCAPE.alone),
+    Remap(Key.ctrlR.without.ctrl, to: Key.ESCAPE),
     // To launch OmniFocus faster
     Remap(Key.shiftL.without.shift, to: Key.SPACE.with.shift.command.option),
 ]
diff --git a/KeyType/Collection/Emacs.swift b/KeyType/Collection/Emacs.swift
index 97b8970..56a074e 100644
--- a/KeyType/Collection/Emacs.swift
+++ b/KeyType/Collection/Emacs.swift
@@ -8,13 +8,12 @@
 
 import Foundation
 
-let Emacs = [
-    [Key.ctrlL.without.ctrl, Key.ESCAPE.alone],
-    [Key.J.with.ctrl, Key.RETURN.alone],
-    [Key.M.with.ctrl, Key.RETURN.alone],
-    [Key.F.with.ctrl, Key.RIGHT_ARROW.alone],
-    [Key.B.with.ctrl, Key.LEFT_ARROW.alone],
-    [Key.N.with.ctrl, Key.DOWN_ARROW.alone],
-    [Key.P.with.ctrl, Key.UP_ARROW.alone],
-    [Key.H.with.ctrl, Key.DELETE.alone],
-].map { Remap($0[0], to: $0[1]) }
+let EmacsLike = [
+    Remap(Key.J.with.ctrl, to: .returnKey),
+    Remap(Key.M.with.ctrl, to: .returnKey),
+    Remap(Key.F.with.ctrl, to: .rightArrow),
+    Remap(Key.B.with.ctrl, to: .leftArrow),
+    Remap(Key.N.with.ctrl, to: .downArrow),
+    Remap(Key.P.with.ctrl, to: .upArrow),
+    Remap(Key.H.with.ctrl, to: .delete),
+]
diff --git a/KeyType/Collection/KanaEisu.swift b/KeyType/Collection/KanaEisu.swift
index 661f4ae..d7f0167 100644
--- a/KeyType/Collection/KanaEisu.swift
+++ b/KeyType/Collection/KanaEisu.swift
@@ -9,6 +9,6 @@
 import Foundation
 
 let KanaEisu: KeyMapCollection = [
-    Remap(Key.commandL.without.command, to: Key.EISU.alone),
-    Remap(Key.commandR.without.command, to: Key.KANA.alone),
+    Remap(Key.commandL.without.command, to: Key.EISU),
+    Remap(Key.commandR.without.command, to: Key.KANA),
 ]
diff --git a/KeyType/EventConverter.swift b/KeyType/EventConverter.swift
index bf631b8..3fb6a17 100644
--- a/KeyType/EventConverter.swift
+++ b/KeyType/EventConverter.swift
@@ -35,7 +35,7 @@ class EventConverter {
         }
 
         for remap in candidateRemaps {
-            if eventKeyCombination.isCompatible(with: remap) {
+            if eventKeyCombination.canTrigger(remap.input) {
                 event.keyCode = remap.outputKeyCode
                 event.flags = remap.renderEventFlag(for: event)
                 return event
diff --git a/KeyType/Key/Key.swift b/KeyType/Key/Key.swift
index 58bcd4d..1894e0f 100644
--- a/KeyType/Key/Key.swift
+++ b/KeyType/Key/Key.swift
@@ -45,7 +45,7 @@ enum Key: UInt16 {
     case SQUARE_BRA = 33
     case I = 34
     case P = 35
-    case RETURN = 36
+    case returnKey = 36
     case L = 37
     case J = 38
     case QUOTE = 39
@@ -60,7 +60,7 @@ enum Key: UInt16 {
     case TAB = 48
     case SPACE = 49
     case BACKQUOTE = 50
-    case DELETE = 51
+    case delete = 51
     case ENTER_POWERBOOK = 52
     case ESCAPE = 53
     case commandR = 54
@@ -123,10 +123,10 @@ enum Key: UInt16 {
     case F2 = 120
     case PG_DOWN = 121
     case F1 = 122
-    case LEFT_ARROW = 123
-    case RIGHT_ARROW = 124
-    case DOWN_ARROW = 125
-    case UP_ARROW = 126
+    case leftArrow = 123
+    case rightArrow = 124
+    case downArrow = 125
+    case upArrow = 126
     case PC_POWER = 127
     case GERMAN_PC_LESS_THAN = 128
     case DASHBOARD = 130
diff --git a/KeyType/Key/KeyCombination.swift b/KeyType/Key/KeyCombination.swift
index a94afd6..aba238e 100644
--- a/KeyType/Key/KeyCombination.swift
+++ b/KeyType/Key/KeyCombination.swift
@@ -10,17 +10,13 @@ import Cocoa
 
 class KeyCombination {
     let keyCode: CGKeyCode
-    var flags = CGEventFlags()
+    private(set) var withFlags = CGEventFlags()
     private var withoutFlags = CGEventFlags()
     private var addToWithFlag = true
 
-    var withoutModifier: CGEventFlags {
-        return withoutFlags
-    }
-
     init(fromEvent: CGEvent) {
         keyCode = fromEvent.keyCode
-        flags = fromEvent.flags
+        withFlags = fromEvent.flags
     }
 
     init(_ key: Key) {
@@ -29,7 +25,7 @@ class KeyCombination {
 
     private func addMask(_ mask: CGEventFlags) -> KeyCombination {
         if addToWithFlag {
-            flags.insert(mask)
+            withFlags.insert(mask)
         } else {
             withoutFlags.insert(mask)
         }
@@ -52,33 +48,14 @@ class KeyCombination {
         return addMask(.maskAlternate)
     }
 
-    private func setModeExAddition() {
-        addToWithFlag = false
-    }
-
     var without: KeyCombination {
-        setModeExAddition()
+        addToWithFlag = false
         return self
     }
 
-    var label: String {
-        guard let key = Key(rawValue: keyCode) else { return flagString }
-        return flagString + String(describing: key)
-    }
-
-    private var flagString: String {
-        var flagString = ""
-        if has(modifier: .maskSecondaryFn) { flagString += "(fn)" }
-        if has(modifier: .maskAlphaShift) { flagString += "⇪" }
-        if has(modifier: .maskCommand) { flagString += "⌘" }
-        if has(modifier: .maskShift) { flagString += "⇧" }
-        if has(modifier: .maskControl) { flagString += "⌃" }
-        if has(modifier: .maskAlternate) { flagString += "⌥" }
-        return flagString
-    }
-
-    private func has(modifier key: CGEventFlags) -> Bool {
-        return flags.contains(key)
+    var with: KeyCombination {
+        addToWithFlag = true
+        return self
     }
 
     func postEvent() {
@@ -87,15 +64,14 @@ class KeyCombination {
         let keyDownEvent = CGEvent(keyboardEventSource: nil, virtualKey: keyCode, keyDown: true)!
         let keyUpEvent = CGEvent(keyboardEventSource: nil, virtualKey: keyCode, keyDown: false)!
 
-        keyDownEvent.flags = flags
+        keyDownEvent.flags = withFlags
         keyUpEvent.flags = CGEventFlags()
 
         keyDownEvent.post(tap: loc)
         keyUpEvent.post(tap: loc)
     }
 
-    func isCompatible(with mapping: Remap) -> Bool {
-        let cmb = mapping.input
+    func canTrigger(_ cmb: KeyCombination) -> Bool {
         if cmb.has(modifier: .maskCommand), !has(modifier: .maskCommand) { return false }
         if cmb.has(modifier: .maskShift), !has(modifier: .maskShift) { return false }
         if cmb.has(modifier: .maskControl), !has(modifier: .maskControl) { return false }
@@ -103,6 +79,33 @@ class KeyCombination {
         if cmb.has(modifier: .maskSecondaryFn), !has(modifier: .maskSecondaryFn) { return false }
         if cmb.has(modifier: .maskAlphaShift), !has(modifier: .maskAlphaShift) { return false }
 
-        return mapping.hasAnyModToAvoid(flags)
+        return cmb.hasAnyModToAvoid(withFlags)
+    }
+
+    private func hasAnyModToAvoid(_ flags: CGEventFlags) -> Bool {
+        return flags.rawValue & withoutFlags.rawValue == 0
+    }
+
+    private func has(modifier key: CGEventFlags) -> Bool {
+        return withFlags.contains(key)
+    }
+}
+
+// Debug
+extension KeyCombination {
+    var label: String {
+        guard let key = Key(rawValue: keyCode) else { return flagString }
+        return flagString + String(describing: key)
+    }
+
+    private var flagString: String {
+        var flagString = ""
+        if has(modifier: .maskSecondaryFn) { flagString += "(fn)" }
+        if has(modifier: .maskAlphaShift) { flagString += "⇪" }
+        if has(modifier: .maskCommand) { flagString += "⌘" }
+        if has(modifier: .maskShift) { flagString += "⇧" }
+        if has(modifier: .maskControl) { flagString += "⌃" }
+        if has(modifier: .maskAlternate) { flagString += "⌥" }
+        return flagString
     }
 }
diff --git a/KeyType/Key/Remap.swift b/KeyType/Key/Remap.swift
index 9466b35..772a48b 100644
--- a/KeyType/Key/Remap.swift
+++ b/KeyType/Key/Remap.swift
@@ -18,12 +18,13 @@ class Remap: NSObject {
         self.output = output
     }
 
-    func renderEventFlag(for event: CGEvent) -> CGEventFlags {
-        let rawValue = (event.flags.rawValue & ~input.flags.rawValue) | output.flags.rawValue
-        return CGEventFlags(rawValue: rawValue)
+    init(_ from: KeyCombination, to output: Key) {
+        input = from
+        self.output = output.alone
     }
 
-    func hasAnyModToAvoid(_ flags: CGEventFlags) -> Bool {
-        return flags.rawValue & input.withoutModifier.rawValue == 0
+    func renderEventFlag(for event: CGEvent) -> CGEventFlags {
+        let rawValue = (event.flags.rawValue & ~input.withFlags.rawValue) | output.withFlags.rawValue
+        return CGEventFlags(rawValue: rawValue)
     }
 }
diff --git a/KeyType/KeyEventWatcher.swift b/KeyType/KeyEventWatcher.swift
index 726815e..970be1a 100644
--- a/KeyType/KeyEventWatcher.swift
+++ b/KeyType/KeyEventWatcher.swift
@@ -11,7 +11,7 @@ import Cocoa
 class KeyEventWatcher {
     private var keyCode: CGKeyCode?
     private let bundleId = Bundle.main.infoDictionary?["CFBundleIdentifier"] as? String
-    private let config = EventConverter(LRDvorak + KanaEisu + Emacs + Custom)
+    private let config = EventConverter(LRDvorak + KanaEisu + EmacsLike + Custom)
 
     private var eventMaskToWatch: CGEventMask {
         let eventTypeList: [CGEventType] = [
diff --git a/KeyTypeTests/KeyCombinationTests.swift b/KeyTypeTests/KeyCombinationTests.swift
index 780ea5d..32c1d77 100644
--- a/KeyTypeTests/KeyCombinationTests.swift
+++ b/KeyTypeTests/KeyCombinationTests.swift
@@ -18,6 +18,10 @@ class KeyCombinationTests: XCTestCase {
         XCTAssert(convert(KanaEisu, key: Key.commandR)?.keyCode == Key.KANA.rawValue)
     }
 
+    func testChain() {
+        XCTAssertFalse(Key.commandR.without.command.withFlags.contains(.maskCommand))
+    }
+
     private func convert(_ collection: KeyMapCollection, key: Key) -> CGEvent? {
         let converter = EventConverter(collection)
         let event = CGEvent(