I've only overhauled starter/gens and inspected injectors with them, so have no deeper interaction than that. Bob Hancock has always been good at communication and because he has a pretty extensive parts inventory, turnaround was always quick. Spoke to him about 3rd wheel options at length.I have only good things to say.
I would however mention another contact I like a lot: Brian at Arkansas Turbine. He's a honest and knowledgeable Garrett guy that does good work at fair price. My friend Stan and his 681 took it for him for tune-up, elbow etc and it was very reasonable. He gained a lot of power, more than 100hp per side after bench tests.