Thanks for the tips Ken. I'll be sure to check the connections, both visually and I'll wiggle them with the motors running on the bench (props removed of course).
The replacement arm arrived today from UAVproducts.com and I should have bought a few, since they're only $4.00 ea. I'm looking forward to the rebuild and recalibration etc. On flights before the crash flight, postion hold was not working well. The craft would revolve around 10-15' diameter orbit path. Upon the initial build, it was rock steady.
I suspect my crash was caused by the GPS and altitude hold ceasing to work (for one reason or another.) Had all green on the LCD before launch. In the windy conditions I was struggling to keep it in one place, and I may have over comped and flew it into the ground. As it angled down into the middle of the soccer field, I was a bit relieved that it was coming down... and not going somewhere beyond my control.
I tried RChover.com for the 9" Graupners but they and UAV product were out of stock. I'm curious about the other place you mentioned (near me) where I could acquire Graupner props. this was my first real crash with a multi slamming into the ground, parts flying off etc, etc.
Thanks again for your help Ken and thanks to everyone else who responded.
Replacement arm arrived today and props are expected tomorrow. I may be flying again this weekend. I've got to replace the arm and while I have the top off I'll be reseating all my controller and transmitter connections. I've also got to pick at and vacuum dirt out of the motors. I'm also going to re-do the calibrations with NAZA software and a compass calibration before my next flight.
BTW, I had initially glued my GPS unit's plastic post into supplied base plate. It was loose after the crash and just possibly before the crash. The glue dried brittle. During the rebuild, I'l use the glue AND a wrap of duct tape to assure the GPS / compass unit stays put.