Really - you’re actually using Just For Keys? I thought JFK was “At the moment, only ideas in my head and this image” from @jofemodo :
zynthian_jfk_proto_02
from Zynthian JFK (Just For Keys) - #2 by jofemodo
Has JFK actually been implemented; or did you just mean more generally that you’re using Zynthian as a Keyboard playing instrument?