Thom, I did grind a small flat spot on the shaft. For dust protection I'll wire tie one of these Outerwear filters to the rear of the motor. http://www.outerwears.com/proddetail...9290&cat=12439

The Outerwears mesh lets air flow but really keeps the junk out. I've used them on a lot of motors and they work well.
Sorry to hear about the 2230 size problem. I've sent Steve Neu a few e-mails asking him to update the 22XX sizes on his page, but nothing yet.