If Bill comes by he can answer all your questions and get things straightened out for you or answer some questions for you.
As to OS service, yes I have had a problem with them but it was 10 or more years ago and from what I have seen things have gotten better sense I had my problems. A lot better!!
It's been that long sense I have ever used there service and decided to just do my own work on my engines.
Never the less, I have often asked Bill questions and gotten very good replys and answers. Not always what I want to hear but he is a straight shooter and I trust his word.