Deltronics I’m sure does good work.
a lot of Chicago shops, repair shops, swap parts, or use inferior parts.
im not saying the “DO”, I’m saying be careful.
This is from experience at Martroy electronics.
Chicago repair shops, be careful and investigate.
Glad your happy.
There is a small mom n pop place in Rockford which I have used twice. Inspected, they opened up the amp, showed me all they did, and a hand written list of parts removed and what parts were replaced.