theres no way I can adjust the channeling. lower framework has been built ontop of the frame, and theres no way to change it short of lots of fabrication..

how about the riser all the way across and build a center console in the center of it?.. they don't have to move, but that feature would be nice..

I think I might be ok. the seats have about 2" of padding+ the base is 3/4" plywood, so I should be able to lower the seats themselves by 1.5" I think, and I remeasured and It was 10" that I need and not 12". so 9.5" riser might not be too bad