Got a great deal on a Kendrick K Spot last year but it started making a roaring white noise when taken off standby. I took it to a well regarded local amp builder and repairman. Their wait times are about 2 weeks so 3 weeks later they call and say it needs a cap job, $350. I okayed the work which took 5 weeks. When I went to pick the amp up the white noise was gone but the amp had a harsh and buzzy quality that wasn't there before. We rolled various pre-amp tubes and settled on a low gain Sovtek as the best choice. I paid the bill and brought the amp home. I plugged it in the very next day and the white noise was back full force. Took it back (40 miles round trip each time) and we rolled tubes again. It was also discovered that a solder joint in the reverb tank wasn't just cold, it had never been soldered. The guy soldered it, we rolled tubes and got the amp to quiet down. You see the pattern here. It has been supposedly "fixed" 3 times now. Sure enough, it started roaring again every time I took it off standby. The amp is now back in the shop and I made him promise to call Kendrick and talk to Gerald personally as I had called him and he said he thought mine was an early one with a design that has since been improved. So, when I go pick up the amp this time it will be my FIFTH trip to the shop! I feel like I took my car to the shop for running rough and they replaced the engine before they even looked at the fuel filter. Doing a full cap job seems pretty drastic on an amp that is only a few years old. Regardless, the cap job DID NOT solve the noise problem so, clearly, the justification for such expensive work was wrong in the first place. I am dreading a showdown with this repairman as he can hold my amp hostage if he wants to. I believe he actually owes ME money at this point. Any thoughts on this situation?