A while back i went through a huge tranny swapping stage, trying out different transistors in every build, the thought process being why make the stock pedal if i can make it sound better (to my ear). The conclusion i came to was that unless i swapped for a noticably higher/lower gain tranny there was little to no discernible difference. Mind you 30 odd years of extremely loud gigs probably aint been great for the old lugholes
If it wasn't for this website I would definitely have a life.