You
should be able to do a mouse hack or use the optipac or optiwiz for the 360 optical wheel. I
think that happs uses the same sensor board as their arcade trackball (NOT the ps2/usb TB boards), but am not sure of either as I don't have one. I'll text one for you, if I can have the wheel after.

I haven't used happs UGCI either, but the driving version explicitly says "270° Pot Wheel Only, Does Not Support Optic Wheel". Even so, I think you could hook the wheel up to the UGCI's TB X-axis, if I'm right about being able to be hacked to a mouse. But cheaper to go minipac, optipac+ipac, optiwiz+keywiz, optiwiz+gpwiz, or some combo of the above if you just want digital pedals. If you want analog pedals, you could go optipac+apac. And you'll most likely get better support from here and ultimarc or GGG with the later, than with the UGCI & happs, since the later have all been tested by people here. That said, I bet the UGCI will work fine, with the wheel hooked to the TB.