1/4" (6.35mm) Z Axis Spacer

This is a 1/4" (6.35mm) spacer for [PowerSpec 3D X Dual Extruder Printer](http://www.microcenter.com/product/432552/3D_X_Dual_Extruder_Printer), FlashForge Creator Pro, and Creator X with the newer platform so they can use a glass pane on the heated build plate.
After I got my 3DX, I realized it did not have the same support platform as the original Creator X that this unit is based on, so I could not use Creator X Z-axis spacers. I noticed some convenient screw locations, so I created this s