I have a Prusa I2 that is currently in pieces and I would like to buy and upgrade the machine to produce the best possible prints it can with at least dual color extruders. Can someone help me upgrade the machine if they have a prusa i2 as well? Things such as, heated bed additions, a possible lcd screen, emailing and queue ability? If you have a prusa i2 with said upgrades, instruct me on how to assemble it and what parts I would need. Thanks