I dunno, the HT Club 50 I just worked on was built pretty well. Had to replace a potentiometer that took a hit. Board was thick with all components locations labeled. The solder pads were substantial. Better boards than current Marshall. Easy to dissassemble, not a fan of the lead free solder but everything has that now. Pretty kickin amp for not alot of money.
Only two preamp tubes? That is a big deal? The old MP1’s had two, tons of gain.
Just saw Uli Roth a few days ago…still touring with his Blackstar.