Thanks again, Drag. I bought TuneBoy from NewR3 and their service, both before and after the purchase, was outstanding.
Actually the ebay seller is Performance Cycle in Oklahoma and although they seem to be very disorganized they also appear to be honest. But I've learned my lesson about trying to save a few bucks: doesn't always = best deal. Anyway if they don't reimburse me as they said they would I'll tell all about it, Paypal, ebay and R3owners alike.
I'm planning to go to our local R3 meeting tonite and will discuss further with TurboFan, TravelGuy and other attendees and show them the fitment problem. Who knows, maybe I have a defect in my fender or something. But my pillion seat attaches just fine whereas there was no way I could install even two, let alone all three, standard screws to attach the "rack" they sent me.