One Up with heated bed.

Since nobody would comment on the One up, and I wanted to get into 3d printing and couldnt wait to see what anyone could or would say. I ordered a new One Up with heated print bed. Order was placed via Amazon on 12/23/2014 so lets see how soon I can get it in my hands and begin building it.

I have started looking for printable parts for upgrades like pulley to help stop the well documented cases of gantry sag caused by there only being a single Z axis stepper motor. What else should I look for when it does arrive and I begin to put it together?