This info isn't in the manual, so can anyone tell me how to adjust the bridge height of this guitar with the included wrenches?  The set screws on top of the bridge don't turn, and I don't want to force them.  It seems as though I need to first loosen the two tiny screws on the bottom of the bridge.  The problem is that, while the smallest wrench fits in one of these screws, it turns freely in the other, as if the head is stripped.    I've adjusted the bridge on many other electric guitars, including a fancy Ibanez Prestige with a ZR2 bridge, so I'm not a complete novice at this, but I don't want to proceed with this until I'm 100% sure I'm doing the right thing and that I don't have a stripped screw in my bridge.