It's always nice to have someone nearby when it all gets in the handbasket [:@]. Even if they can't help with the actual problem, they can help calm the frayed nerves. I agree with the do-it-yourself maidens. I do all of my own, plus I do quite a few for less experienced pilots. Those are usually the ones that turn out to be a handful if I miss something that should have been adjusted before flying. One step that I always take (every daythat I fly) is on the first flight, before I begin to taxi, I make one last check of control surface directions. I've seen pilots take off with a plane that they've been flying awhile and somehow, they have the ailerons reversed. That's never a pretty sight.