with shmesa, one can call : shmesa change inlist_main mixing_length_alpha 2
but one can't call: shmesa change inlist_main x_ctrl(1) 2
-> zsh: unknown file attribute: 1
I believe shmesa is missing support for user controls such as: x_ctrl, x_integer_ctrl, x_logical_ctrl
A small hot fix can bring support for these.