I am building the UM2 clone with RAMPS1.4 and Repetier software. I'm using the famous 20X20 heatbed from Alie and a $3.00 e3d head.
Still waiting for the rods to arrive.
Tested the Repetier software in a dry run "on the tabel" with the steppers and endstops connected. All works fine.
I'll send some pix when finished.
Nice build and well documented, thank you