Wingman,
There is a simple solution to your problem. First off, remove the fiberglass spacer. Not to get into physics, but the bulky spacer is a culprit in your parts breakage. Shim the T-bar with regular metal washers until it is flush with the chassis. Second, don't insert the middle screw. It again causes breakage during a crash.
Try these simple two things and you'll find much less breakage, if any.
Thought I'd save Larry the typing, Jeff had him working overtime at the Nats. If only you would have marshalled for him too Larry....