Foam Wall Questions

Couple of quick questions regarding foam wall :-
1. Should I be attempting to install 125ft foam wall in one piece ?, or should I be cuting it down to more managable pieces ?
2. Pool wall in shallow end is 40inches, should I be looking to trim this down before or after the wall has bonded ?
3. I have assumed for the deep end - foam will just sit on the concrete floor/wall.

Any advice would be appreciated.
JJNMRSDAD

bumping this back up

Is it too late?

Sorry to have missed this - I just found out how to see the posts I've missed.