Hey Nick,
I like this mod and Im going to do a version on my car. However, the cross bar on the SPF is square tube. I will drill thru and bolt it in.
But that got me thinking about the flat plate on the round tube of the CSX.
I think it must be gusseted and welded like a spring perch.
I feel that in and impact like the one on csxinfo.net, the flat plate would deform around the tube sufficiently to loosen the clamping force and slide laterally, allowing the hoop to partially collapse and exposing the driver significantly.
I think it must be welded in to be truely effective.
Best regards
Jason