TOM-BOY with GEN4 Electronics

I designed a larger dual head 3D printer using Generation 4 electronics from MBI, I call it affectionately TOM-BOY. It took me some time but I could not sleep unitl I designed a printer that was larger, accurate and reliable. At least I think it will be? I designed it using standard DFM policies using common parts through out. The design uses all dual NEMA11 Non-Captive screw drives on each axis. The screw I selected will give .001mm acuracy and 400mm in travel. The print area is right at 2