diff --git a/chirp/chirp_common.py b/chirp/chirp_common.py
index 3ec4f371..49a21988 100644
--- a/chirp/chirp_common.py
+++ b/chirp/chirp_common.py
@@ -814,6 +814,10 @@ def LIST(v):
     assert hasattr(v, '__iter__')
 
 
+def LIST_NONZERO_INT(v):
+    assert all(x > 0 for x in v)
+
+
 def INT(min=0, max=None):
     def checkint(v):
         assert isinstance(v, int)
@@ -865,7 +869,7 @@ class RadioFeatures:
         "valid_modes":          LIST,
         "valid_tmodes":         LIST,
         "valid_duplexes":       LIST,
-        "valid_tuning_steps":   LIST,
+        "valid_tuning_steps":   LIST_NONZERO_INT,
         "valid_bands":          LIST,
         "valid_skips":          LIST,
         "valid_power_levels":   LIST,
@@ -1736,10 +1740,21 @@ def required_step(freq, allowed=None):
         8.33: is_8_33,
     }
 
+    # Try the above "standard" steps first in order
     for step, validate in steps.items():
         if step in allowed and validate(freq):
             return step
 
+    # Try any additional steps in the allowed list
+    for step in allowed:
+        if step in steps:
+            # Already tried
+            continue
+        if make_is(int(step * 1000))(freq):
+            LOG.debug('Chose non-standard step %s for %s' % (
+                step, format_freq(freq)))
+            return step
+
     raise errors.InvalidDataError("Unable to find a supported " +
                                   "tuning step for %s" % format_freq(freq))
 
diff --git a/chirp/drivers/ft1d.py b/chirp/drivers/ft1d.py
index c0b5ad44..d0e96325 100644
--- a/chirp/drivers/ft1d.py
+++ b/chirp/drivers/ft1d.py
@@ -514,10 +514,7 @@
 TMODES = ["", "Tone", "TSQL", "DTCS"]
 DUPLEX = ["", "-", "+", "split"]
 MODES = ["FM", "AM", "WFM"]
-STEPS = list(chirp_common.TUNING_STEPS)
-STEPS.remove(30.0)
-STEPS.append(100.0)
-STEPS.insert(2, 0.0)  # There is a skipped tuning step at index 2 (?)
+STEPS = [5.0, 6.25, 8.33, 10.0, 12.5, 15.0, 20.0, 25.0, 50.0, 100.0, 9.0]
 SKIPS = ["", "S", "P"]
 FT1_DTMF_CHARS = list("0123456789ABCD*#-")
 
@@ -916,7 +913,7 @@ def get_features(self):
         rf.valid_modes = list(MODES) + ['NFM', 'DN']
         rf.valid_tmodes = list(TMODES)
         rf.valid_duplexes = list(DUPLEX)
-        rf.valid_tuning_steps = list(STEPS)
+        rf.valid_tuning_steps = [x for x in STEPS if x]
         rf.valid_bands = [(500000, 999900000)]
         rf.valid_skips = SKIPS
         rf.valid_power_levels = POWER_LEVELS
@@ -1042,7 +1039,7 @@ def get_memory(self, number):
             mem.duplex = ""
             mem.power = POWER_LEVELS[0]
             mem.mode = "FM"
-            mem.tuning_step = 0
+            mem.tuning_step = STEPS[0]
         else:
             mem.freq = chirp_common.fix_rounded_step(int(_mem.freq) * 1000)
             mem.offset = int(_mem.offset) * 1000
diff --git a/chirp/drivers/ft4.py b/chirp/drivers/ft4.py
index ec0a63f7..7fd92b64 100644
--- a/chirp/drivers/ft4.py
+++ b/chirp/drivers/ft4.py
@@ -534,7 +534,8 @@ def get_memory_mappings(self, memory):
 # these steps encode to 0-9 on all radios, but encoding #2 is disallowed
 # on the US versions (FT-4XR)
 STEP_CODE = [0, 5.0, 6.25, 10.0, 12.5, 15.0, 20.0, 25.0, 50.0, 100.0]
-US_LEGAL_STEPS = list(STEP_CODE)  # copy to pass to UI on US radios
+VALID_STEPS = [x for x in STEP_CODE if x]
+US_LEGAL_STEPS = list(VALID_STEPS)  # copy to pass to UI on US radios
 US_LEGAL_STEPS.remove(6.25)       # euro radios just use STEP_CODE
 
 # Map the radio image sql_type (0-6) to the CHIRP mem values.
@@ -1333,7 +1334,7 @@ class YaesuFT4XERadio(YaesuFT4GenericRadio):
     id_str = b'IFT-35R\x00\x00V100\x00\x00'
     valid_bands = VALID_BANDS_DUAL
     DUPLEX_AUTO = DUPLEX_AUTO_EU
-    legal_steps = STEP_CODE
+    legal_steps = VALID_STEPS
     BAND_ASSIGNMENTS = BAND_ASSIGNMENTS_DUALBAND
 
 
@@ -1373,7 +1374,7 @@ class YaesuFT65RRadio(YaesuFT65GenericRadio):
     id_str = b'IH-420\x00\x00\x00V100\x00\x00'
     valid_bands = VALID_BANDS_DUAL
     DUPLEX_AUTO = DUPLEX_AUTO_US
-    legal_steps = STEP_CODE
+    legal_steps = VALID_STEPS
     BAND_ASSIGNMENTS = BAND_ASSIGNMENTS_DUALBAND
     DUPLEX_OFF_VIA_OFFSET = [  # matches the order of valid_bands
         None,  # Don't modify broadcast FM memories
@@ -1391,7 +1392,7 @@ class YaesuFT65ERadio(YaesuFT65GenericRadio):
     id_str = b'IH-420\x00\x00\x00V100\x00\x00'
     valid_bands = VALID_BANDS_DUAL
     DUPLEX_AUTO = DUPLEX_AUTO_EU
-    legal_steps = STEP_CODE
+    legal_steps = VALID_STEPS
     BAND_ASSIGNMENTS = BAND_ASSIGNMENTS_DUALBAND
 
 
diff --git a/chirp/drivers/ft70.py b/chirp/drivers/ft70.py
index b1b54d0a..fbe5b555 100644
--- a/chirp/drivers/ft70.py
+++ b/chirp/drivers/ft70.py
@@ -565,7 +565,7 @@ def get_features(self):
         rf.valid_modes = list(MODES)
         rf.valid_tmodes = list(TMODES)
         rf.valid_duplexes = list(DUPLEX)
-        rf.valid_tuning_steps = list(STEPS)
+        rf.valid_tuning_steps = [x for x in STEPS if x]
         rf.valid_bands = [(500000, 999900000)]
         rf.valid_skips = SKIPS
         rf.valid_power_levels = POWER_LEVELS
diff --git a/chirp/drivers/ftm3200d.py b/chirp/drivers/ftm3200d.py
index 92f9d132..0c54f42e 100644
--- a/chirp/drivers/ftm3200d.py
+++ b/chirp/drivers/ftm3200d.py
@@ -109,7 +109,7 @@ def get_features(self):
         rf.valid_tmodes = [x for x in TMODES if x is not None]
         rf.valid_cross_modes = [x for x in CROSS_MODES if x is not None]
         rf.valid_duplexes = list(ft1d.DUPLEX)
-        rf.valid_tuning_steps = list(STEPS)
+        rf.valid_tuning_steps = [x for x in STEPS if x]
         rf.valid_bands = [(136000000, 174000000)]
         # rf.valid_skips = SKIPS
         rf.valid_power_levels = POWER_LEVELS
diff --git a/chirp/drivers/ftm7250d.py b/chirp/drivers/ftm7250d.py
index 1ede2cd5..85a36946 100644
--- a/chirp/drivers/ftm7250d.py
+++ b/chirp/drivers/ftm7250d.py
@@ -109,7 +109,7 @@ def get_features(self):
         rf.valid_tmodes = [x for x in TMODES if x is not None]
         rf.valid_cross_modes = [x for x in CROSS_MODES if x is not None]
         rf.valid_duplexes = list(ft1d.DUPLEX)
-        rf.valid_tuning_steps = list(STEPS)
+        rf.valid_tuning_steps = [x for x in STEPS if x]
         rf.valid_bands = [(108000000, 580000000)]
         # rf.valid_skips = SKIPS
         rf.valid_power_levels = POWER_LEVELS
diff --git a/chirp/drivers/icp7.py b/chirp/drivers/icp7.py
index 65113334..28741914 100644
--- a/chirp/drivers/icp7.py
+++ b/chirp/drivers/icp7.py
@@ -130,7 +130,7 @@ def get_features(self):
         rf.valid_modes = MODES
         rf.valid_bands = [(495000, 999990000)]
         rf.valid_skips = ["", "S", "P"]
-        rf.valid_tuning_steps = TUNING_STEPS
+        rf.valid_tuning_steps = [x for x in TUNING_STEPS if x]
         rf.valid_name_length = 6
         rf.has_settings = True
         rf.has_ctone = True
diff --git a/chirp/drivers/id31.py b/chirp/drivers/id31.py
index a10e0a75..8aa988ab 100644
--- a/chirp/drivers/id31.py
+++ b/chirp/drivers/id31.py
@@ -198,7 +198,7 @@ def get_features(self):
         rf.has_bank_index = True
         rf.has_bank_names = True
         rf.valid_tmodes = list(TMODES)
-        rf.valid_tuning_steps = sorted(list(TUNING_STEPS))
+        rf.valid_tuning_steps = sorted([x for x in TUNING_STEPS if x])
         rf.valid_modes = list(self.MODES.values())
         rf.valid_skips = ["", "S", "P"]
         rf.valid_characters = chirp_common.CHARSET_ASCII
diff --git a/chirp/wxui/memedit.py b/chirp/wxui/memedit.py
index fcebc0da..50503a10 100644
--- a/chirp/wxui/memedit.py
+++ b/chirp/wxui/memedit.py
@@ -1337,18 +1337,12 @@ def _set_memory_defaults(self, mem, *only):
         else:
             want_tuning_step = 5.0
             try:
-                # First calculate the needed step in case it is not supported
-                # by the radio. If we fail to find one the radio supports,
-                # we will use this one and then the error message about it
-                # being unsupported will be accurate.
-                want_tuning_step = chirp_common.required_step(mem.freq)
-
-                # Now try to find a suitable one that the radio supports.
+                # Try to find a tuning step for the frequency that the radio
+                # supports, or with the default set
                 want_tuning_step = chirp_common.required_step(
-                    mem.freq, features.valid_tuning_steps)
-                LOG.debug('Chose radio-supported step %s' % want_tuning_step)
+                    mem.freq, features.valid_tuning_steps or None)
             except errors.InvalidDataError as e:
-                LOG.warning(e)
+                LOG.warning('Failed to find step: %s' % e)
 
         if 'tuning_step' in only and want_tuning_step:
             mem.tuning_step = want_tuning_step
diff --git a/tests/unit/test_chirp_common.py b/tests/unit/test_chirp_common.py
index 458a1268..92f062f4 100644
--- a/tests/unit/test_chirp_common.py
+++ b/tests/unit/test_chirp_common.py
@@ -503,6 +503,11 @@ def test_required_step_finds_suitable(self):
         self.assertEqual(2.5, chirp_common.required_step(self._005[0],
                                                          allowed=[2.5]))
 
+    def test_required_step_finds_radio_specific(self):
+        # Make sure we find a radio-specific step, 10Hz in this case
+        self.assertEqual(0.01, chirp_common.required_step(
+            146000010, allowed=[5.0, 10.0, 0.01, 20.0]))
+
     def test_required_step_fail(self):
         self.assertRaises(errors.InvalidDataError,
                           chirp_common.required_step,