If you're not satisfied with your build and you feel you need to start over, I support that. Just remember you are your own worst enemy, and small mistakes can be rectified.
If I may throw my 2 bits in, I think the pep build looked OK and couldn't see any major warping. Doesn't mean it's not there, I guess, but it definitely looked better than my first pep attempts.
Helmets are hard, man. So remember to be patient with yourself and go slow. These are crock pots, not microwaves. It takes time and effort, not a quick minimal try.