Paul,
Your perseverance on this topic is very sympathetic and I hope you can fulfill your original idea.
This is how you can get from "PlughW: 1.0" and "Plughw: 2.1" to [Sbitxdigiout] and [Sbitxdigiin].
The latter are more understandable to users.
This is where teamwork can be seen, where everyone adds their own knowledge to achieve a common goal.
--
Gyula HA3HZ
HA3HZ