How do Crowbars fit under this helmet?
They will fit just fine. If you want a perfectly flush fit go with any of the Smith goggles. They designed all of their goggles with their helmets in mind so they all fit great.
I think they fit OK. Pull up the goggle strap on the helmet so that it pulls the gaper gap closed... This helmet is the best. And Crowbars are awesome. So it's worth it to have that slighly imperfect alignment...