Hi there, I fell into a Sunn Concert lead amp a while back. After doing some testing with other cabs, I found it to be quite loud enough for my needs. The tone is also awesome, but I'm also old school. The volume cuts in and out when I turn the various tone and volume knobs, I've tried spraying them out, using electronic cleaner, vacuuming, etc, and I don't have access to the internal parts that might be necessary for repair. Can someone recommend a good amp tech in the Seattle area? I also have a limited budget due to the Finance Department (wife). Thanks in advance.