I am trying to get my mendel prusa up and running after taking a few months off due to pure frustration... I am a newbie to all of this and all the information/variations are making my head spin. I have a sanguinololu 1.3a w/ ATmega1284p running on windows 7. The chip was pre-loaded with a bootloader and sprinter firmware. It was tested prior to shipping and the tiny chip on the back was pre-solby ccrain4 - Sanguino(lolu)