I wonder if it's something about the OS LAs that result in guys having problems with them breaking. Where do they break? The Magnums I run can sometimes break around the carb if it gets jammed back, but that's easy to fix with some JB Weld. I have 3 or 4 engines that have been repaired that way. (Including a TT Pro .46 that a guy crashed and was going to throw away. It runs great now).