hood tach

Thought I would give the boys at Bob's speedometer in MI. some free advertising. YOU GUYS SUCK!!!!!!!!!!! I had the hood tach rebuilt from them for a measly $550! It was expensive because they had to rebalance my original needle on a new unit.I sent it back twice. Once because it did not work at all, and once because it was registering 1000 rpm to low, and the light did not work. They also lost my redline pointer. Recently my orange deuce did not start and it turned out that the tach was shorting out the ignition system. $550 later the tach is disconnected. Does anyone know of a REPUTABLE shop to fix this? Thanks