I'm putting together a sim rig made out out of extruded t-slot aluminum and have decided to use an NB1 Miata seat with it. I'd like to keep the slider but I realized that the mounting brackets are angled. I'm prefer leaving the brackets unmodified and I think that I could connect the bracket to the base using angled washers. Does anyone know the angle of the mounting brackets? Google has failed me today, so I am once again asking you for the Answer wisdom!