cheers Mate
Rib= not so much for stiffness but to stop it bending in a massive shunt..and losing all that hard work.....i suppose it depends on how thick the bottom plate is.......on my B4 it was only 0.3 mm thick ( or thin shall we say )
i just felt my way with the dimentions being experienced with the tried and tested Durango
If it was ok for Gerd it was ok for me....lol
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