The serious shifters do not fit standard mounts. A BDH servo unit, a Pro-Sim sequential or a Simworx Pro Series has a footprint and a weight that a normal bracket was never drawn around, and forcing the issue gives you a lever that moves when you pull it.

This is the oversized plate for exactly those. A larger mounting surface on the same TR-One two-slot system, with the same distance slider, sized for units that are bigger and heavier than the mainstream.

The trade is deliberate: a wider plate for a narrower compatibility list. Check yours against it before ordering rather than after. It sits with the rest of the hardware mounts we carry for aluminium chassis rigs.