took it to the shop today.
replaced both 6L6's with same Mesa STR 420 stock.
noticeable improvement in tone.
changed the number 2 & 3 12AX7 with same Mesa stock.
no noticeable change.
Also gave it a thorough cleaning, looks MUCH better!
There is a random rumbling sound when the amp is super cranked
and no signal passing through. (muted guitar).
sound familiar to anyone?
Proabably going to drop it off at the Mesa factory for the refurb service.
$120-$215 they say...
still stoked. it plays well and sounds great!