Hypersport
Account deactivated by request of user after tantr
Buy a J-Pac and you should fix any lag.
Looks promising except: "No special drivers needed. USB drivers are generic Windows."
But it claims to process each input seperately:
"All inputs are completely separate and generate their own interrupt - this is the fastest possible method."
So the hardware looks capable, but I worry about the "generic Windows driver" part. If USB drivers in Windows are a problem, then this might not do it.
I looked at the one on Ultimarc -- I might give this a try. The price doesn't look too bad if it will fix the problem.
