I finally purchased my first Festool. Sadly it died during the 2nd time I used it. The first time I was practicing with a few scrap pieces of wood switching between grits and modes for approximately 30 minutes. The 2nd time I was using it I was using 120 grit in RO mode at a setting of 3.5 and it stopped. I can turn the switch to off and then back on and it will run for a few seconds and then die again. The head of the Rotex is warm but not hot. Temperature where I was using the sander was around 50 F. I'm at a loss and very disappointed in Festool. What should I do?