I run the center roll hoop on mine for roof support and just had to lift the rear body mounts up, after seeing the above setup the brace is certainly feasible.
The issue with the thin-lightweight TLR chassis, landing on a decent rock or skatepark pipe will taco the chassis regardless of tower rigidity IMO. Might want to go 4mm ADU 7075 with +3mm center structure machined into the chassis if the moon landing could be an immovable/unforgiving obstacle.
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