On my Super Sport there are tabs welded to the fuselage tubing that appear to be for nutplates to attach the seat. I seem to remember asking John McBean about it and he confirmed this. However, today I tried to mount the nutplates and found the tabs have the wrong hole layout. Apparently, nutplate mounting holes are 11/16" apart and the holes in the tabs are 3/4" apart. I realize these fit the camlocs, but that doesn't really help. Anybody know what the deal is?