This is my take on the Board Clip by robidouille (http://www.thingiverse.com/thing:1520316) which I really like, but I wanted something that I could screw to the sub-plate. I haven't printed it yet.

It's designed in Solidworks.

V1 is a revolved sketch with the PCB at 12.7mm and it's 25m tall. (sorry for the orientation) V2 is a loft with the PCB at 12.7mm and it's 24.7mm tall.

If you print and use it before I get a chance to, let me know how it works out for you!