Blue Shadow
Waiting for Vintage Gear from this century
Well you did your best.
Maybe OP hasn’t been around to respond to each suggestion
Or any number of other things getting in his way of doing what everyone here suggested.
No problem, it is his amp, his expenditure and his responsibility to do with the amp as he sees fit.
We can just step back and await any update, good or bad, if it ever comes.
I usually just contact Gadget73 for tube issues.