I flew my 1st Mooney in March, 1964, between then and 1970 accumulating some 400 hrs of Mooney time. Not so much thereafter until last week when I purchased a beautiful M20C. It has been delightful recapturing a bit of my youth. My manual gear swinging skills came back quickly with one exception, the latch. This one seems inordinately difficult to unlatch, to the point of needing both hands (not a good idea). Getting the thumb button fully depressed and then the collar to slide takes greater effort than I recall. It seems forward pressure may help. (Yes, I was 18 then and 70 now, but . . .)
I am guessing that before getting it up on jacks and exploring, you folks probably have some ideas of what to check out.
In the '60's these were new airframes and I'm sure there are wear issues by now. BTW mine is a 5600 hour plane.