Those motors are notorious for the endbells shorting out. I had one that shorted and Timmmayyyyy was able to fix it real quick like with a dremel. As far as the cap board, just solder some external caps on the tab and endbell and you'll be fine. However, you may want to use a desoldering tool and remove all of the solder that you put on there. That might be the source of your short. Have Stamper check it out and he can get it going for ya again I'm sure. The motor's not toast, you just have to take care of that short and put some external caps on there.
I'll probably be leaving a present for you up at CEFX on thursday or friday. I'll let ya know.
Talk to ya later junior.