I am building a Mendel Prusa along with the middle school kids from our Robotics group. We have been having some issues with the Sanguinololu v1.3 board design and have fried the 1284p in the process. I have a board kit purchased (from Botronicz) and 'no name' pololu stepper boards from ebay. We are setting up the extruder thermistor, and dry running the printer OK until yesterday when the X-aby cgosnell - Controllers