Re: Choosing b/w Cartels/Union SL's/ Ride Maestro
First, congrats on your SL. I'm about to put mine in an NS Raptor, so I'm about to be interested the same boat.
As far as your cap strap question... I own Union Atlases with similar straps and it really depends on your boot. With my Burton boot into had better luck centering it over my toe, so really it was more to the side . With my Salomon boot, I centered it over the boot itself. However, I still found it slipping off more than occasionally, which prompted me to get the Burton Gettagrips.
I heard the new SL line had stickier cap straps, so I hope that solved that problem.