Parametric SSD mount for HomeRacker

So I wanted to mount the SSDs external to my NAS, because my NAS is a tiny machine. I built this model when I wasn't sure how many drives I would have, so I made it parametric so easy to adjust.Each bay has grip-fins to stop the disks from sliding out, Parameters you can change are:RU No Holes - Length of the side without mount holes (in RU)RU With Holes - Length of the side with mount holes (in RU)Face Depth - mm depth of face plateShell Thickness - mm thickness of outer shell