Wow, gone a long time and I don't have the So Cal anymore but those are set up to be pretty much drop only, and no, I didn't overtighten the springs, I've been using Floyds since before most of you were born. No difference between tightening the springs until it rests flat on the body vs using a stopper or block, the tension is the same to offset the string tension, it's a simple physics thing.
The EVH and Music Man Axis guitars are made for drop only too, the bridges rest against the body.