This is my favorite.
I remove the spring, took out the wire stop and did away with the safty (old school).
Been using these since the 70's.
You end up developing a feel when stripping.
I also uses No-Nik Wires strippers years ago when using the Kynar wire wrap wire. This was 30 gauge solid with a very tough case.
All the tools mentioned above are good, just have to develop the finesse in using them.
Have fun.