I have the MAC sfc's for 2 years now and have added other reinforcement to the chassis also, but still getting lots of door creak/twist and that horrible squeeking around wherer the tops of the windows rub on the weatherstrip.

I have been debating what to do next for chassis mods. I'm building balsa wood chassis models to see what chassis mods are the best for strength and torsion resistance.

I'm wondering if I should convert my 2-pt STB to a 3-pt.

OR, add something similar to the KB lower chassis brace (across the weak trans tunnel at the cowl).

OR, add side rails like the Spohn sfc's.


Anyone with spohn have good results with door stability?