Sydewynder...so far so good.We haven't broke one since we got the spare.I added a couple of extra screws at the back of the shock tower(through the access holes on the shock tower) that are @ 1 1/4" long and screw into the diff cover next to the drive shaft.Also on mine I added a small brace that holds down the shock tower.
As a side note one of our local "fast" guys replaced his screws with button head screws inserted from the inside of the diff case.Just add small nuts and washers to hold down the shock tower! Seems to work well!
As always thanks for looking out for us!