Sphere80 wrote
Sure, that one already uses large resistors from collector to base as part of the design. The layout on the main page has people reporting using MP38A's in it.
I always assumed that was negative feedback or to put a bias voltage on the base
I have tried this simulated leakage trick with a 2m pot in a MKIII and while it worked I ultimately wasn’t liking the sound. I’d say whatever works for you is good but I have preferred to select a part that works without modifications