This is a derivative of Vik's OpenSCAD version of the the leadscrew base. It has been combined with a motor mount and no longer needs the z-tensioner part. It will also save you two of the threaded rods on the bottom. You will also need a shorter belt. It is now a 34"-35" belt. I am using a 35" and the motor is a little over halfway up the slot.Be sure to check out my Mendel build log at http://reprapbreeding.blogspot.com/Print it and use it.You will need Vik's mendel_misc.inc file found here: thingiverse.com/thing:2192