Hello Dan,
I am very happy with your information because i am thinking about doing the same with my cube 3d 2nd gen. printer.
About a year ago i did build a 3d printer (
http://www.thingiverse.com/make:72807) with minitronics Electronics (reprapworld.com).
So i am thinking of using mintronics because a have some experience with that and not with adruino.
I would very much like more information about the marlin firmware and the wiring.
I assume you want to print with ABS because you mention that you need a higher temperature than 215 C?.
So thanks again and Kind Regards,
Frits (The Netherlands)