1. Me neither. The lack of depth perception and (in my setup, at least) perspective vision makes it uniquely challenging to maintain a consistent distance without frequent glances to Lead. Maybe that comes with experience? I'm hoping to learn.
2. Me neither. But then, I don't have much experience with real formation flying basics anyways. And by real formation flying, I mean station keeping with a sight picture, cross unders, extend trail chase, etc. - not just flying next to some other airplane.
Shoot to Kill.
Play to Have Fun.