OK
This is the fact part. Lets say a 3 wrap (6 coil) prussik works nice on DRT but on SRT it bites too hard and you get stuck.
What would you do, to that prussik to lessen the grip and make it respond more like the DRT system?
1/ Increase dia of rope of prussik
2/ More wraps (coils)
3/ Less wraps (coils)
4/ Different fiber rope
5/ ? Dont know but you might
Maybe all we need to do is find a better prussik