Larry - I have 2500+ on Gazelle, Ex-Royal Navy QHI and "Sharks". I can give you a comprehensive run through all the questions you are asking, email me direct and I will put together some info for you.
I have several contacts who are selling these machines and contacts regarding maintaining them. I am also in possession of a full suite of technical notes.
They are superb helicopters, a touch noisy, but an excellent sports machine.
Oh yeah and .......
I have always wanted to visit California!