I am thinking of dragging out my old Act-Labs USB shifter. Anyone this up in Raceroom? Or other USB 3rd party shifter? I have a new TMX Pro that I want to match this with. PS : this should probably be in Community Support......
I used a home made sequential shifter with no problems. As long as it's seen as normal USB device you will be fine.
I got a Heusinkveld Sequential Shifter a few months and it's beautiful. High price tag, but more than justified with the construction and feel.