About this 3D model

This is a redesigned printer, kinda from the printrbot. I am just learning to get things built from sketchup. I have made this printer because I was tired of the problems I was having with the Printrbot. So I made this one. I don't have everything yet. But suggestions would be welcome. More pictures will be coming. All motors will have a fan with heatsink. It seems like alot of plastic but I wanted somthing that was going to be solid and easy to put together. Once I have it more complete I will add all the files. I already have a few changes I would like to make. But I would like to get this one going before making to many changes. Update. Today I was able to get the bed mounted and some of the electronics. If some of the things look off its because this whole printer motors and all came from a standup copier, fax, and printer. we junked a few out and I took the motors and all the smooth rod and some other little stuff. The only thing I have bought is the bearings and electronics.