here is the mount with the whomobile seat centred over the cylinder riser.

the bracket is cut away in the centre so the who bracket can rest on the metal switch bracket for some added load support. the bracket is also slotted at the 2 mount points to allow for any game variance but also the screw holes on the lhs are not straight - rather slightly angled so one bracket suits both sides.

The bracket will be solid nylon as well and be available in red, blue, black, white and maybe the metal flake.