Just a bench mount for my Printrbot Simple to keep it from wobbling. Once mounts are mounted to the bench the Printrbot slides up out of them so it can be worked on and such.
When printing you may have to play with scale some. I increased it to 9 and it printed exactly but my printer isn't dialed in all the way on measurments so I didn't think to build it to measure in Blender.
Something handy to do is flip it 180 degrees and print a couple layers and KILL JOB then test fit that and when its right re-flip and print. I hope you find a use for this :)