In reply to the general gist of the thread I just thought I'd say that I've always used the BUMFISH method. Probably a bit silly having the 'U' part for a fixed trike 152 but what the hell...
As for doors and stuff coming open, I bloody had window on the other side come open today on upwind, so yeah the hatches and harnesses check on downwind doesn't really add up to too much, but procedure is procedure!