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