About this 3D model

I am working on a beltless printer so i modified the x ends from hugo originsals to fit in place a 6mm rod 33cm long to hold 5 modules of herringbone rack and the carriage to fit a nema 14 stepper. Inspired from http://www.thingiverse.com/thing:22475 (resolved the rack from exiting the printer area), and http://www.thingiverse.com/thing:37787 (i intend to use this on y axis). Printed the parts with no support material but have not tested them yet so i don't know how they work. I will say more after i finish the printer. Hope it is a good contribution.