My question is basically this... At what spring pressure do you need to get away from the 2 and 4 groove valve locks? I'm about to install a set of Isky 8005A springs at 1.85" with around .540 lift. Should be about 375# on the nose although I need to confirm that. That being said, are the 2 and 4 groove Comp locks a bad idea? Anyone else running the 2 and 4 groove locks with the higher spring pressures? Just trying to decide if I need to bite the bullet and get some Ferrea valves heading this way at some point... As always, appreciate the help! -Trent