Hang on, surely, having the MO writing up
your flight hours in
your logbooks (which are
your property) from your emails, is somebody taking the p1ss...
Unless your plane has an AD whose applicability falls in between 50hr periods, what hours you fly between the 50hr checks is not the MO's business at all.
IMHO, of course
I am so glad to be N-reg. Write up all the logbooks myself, do the 50hr checks myself (with an A&P/IA who drives down) with some extras added, and for every Annual I can freely choose who does it. One of the best things is that if somebody doesn't do a job right I never need to use them again. Aviation maintenance is full of barrels, with aircraft owners bent over them.