Good morning Rudyard,
I don't mean to not write you, but my day seems to take longer and a lot of stuff is not getting done.
Knees need grease nipples fitting as well.
I have been going to ask you old sport, if you have ever used the peg that we see on some old target arms?
It is a peg that the trigger finger rests against, and takes pressure, allowing just the tip of that finger to touch the hair trigger.
Normally, the trigger finger is sort of dangling in thin air, but with this set up, it has something to lean against.
Patrick on BMF has an ancient target rifle with this set up.
I should see if I can find the thread.
All best me old pal.
Best regards misel'.