thank you poor judgement and bootmachine... thats what I've been saying all along.. I don't bother with the mod because thats a patch fix not the problem.. the problem is the excess shock travel and play in the diff cups.. I check mine regularly and never have a problem.. the last diff cups I broke were due the the tie rods popping off and the wheel turned too sharp in the rear binding the dog bone in the cups.. It broke the cup and bent the dog bone.. quick fix and 5 minutes later, back on the track.... The fuel tubing or the o rings are critical to the longevity of the diff cups..