I sent my amp to Chicago to a specialized repair center noted to be really good. My amp failed after only using it three times, and the reverb circuit was never hooked back up.
I know of Brent's Music. No way would I let him work on my Diezel amps.
I have been searching as well for a really knowledgeable amp tech in this area that has the knowledge to work on Diezel amps and so far, they do not exist.
Larry Rodgers in Naples would not even look at it, and he knows circuitry well, but the older types is all he works on.
This area is a wasteland for high end anything repair.
I would rather send my amp to Bad Steben then trust anyone around here with it.
Lurchhammer,
That place in Tampa is mostly for studio gear repair or computer work. Have you sent your Diezel amp there to be repaired?