hey would you mind describing how ?
i want to do the same but never used Note Expression.
—edit=
OOOOH FOUND IT !
so select Aftertouch in the Note expression list;
go to “no input assigment” select the CC you want to use to control aftertouch.
now you want maybe to add in the Input Transformer “local”
Type Is Equal Aftertouch
Function : Filter
so the aftertouch is only controlled by your CC and not the keyboard pressure anymore to avoid conflitcs.