Wait, 0x46d:0xc294 is device being added by the original patch as
Formula Force EX... Confused.

Here is what I found on the net, maybe it will clear things out:
http://siv.mysite.wanadoo-members.co.uk/downloads/usbdevs.txt

046D:C294=Logitech Driving Force USB (HID)
046D:C294:2000=Logitech Driving Force EX USB (HID)
046D:C294:2100=Logitech Formula Force RX USB (HID)
046D:C294:2200=Logitech Driving Force RX USB (HID)

I have the EX model.

Valentin Zagura