Killer Instinct and Midway W/T-Unit drivers are in a state of dis-repair.
What this means is:
a) I have put countless hours into trying to fix them (weeks, literally)
b) They are as good as they're going to get. I can only recommend using MAME for these games if you _must_ play them.
Of course, every once in a while I go back and try to fix them, because I like a good challenge. But at this point they have me beat...
best regards,
- dink