Angled license plate shelf

This set of files are a set of brackets (left, right, center) meant for mounting a license plate or other strong and thin plate to the wall as an angled shelf. These particular STL files are for a shelf set to a 27º slope. In the Onshape project you can adjust this angle as a variable, as well as the thickness of your plate and a few other parameters.

Due to the length of the object I intend to hold with the shelf (a soldering station), I later added an variable to offset the start point of the license plate within the bracket outward from the wall, leaving room for a thick power cord to hang.

I've attached two sets of 3 STL files, one set for a shelf that is thinner and closer to the wall, and one set for the thicker, extended brackets. The attached screenshots also relate to these two different versions of the shelf. I haven't yet printed the extended version of the shelf, so the photos are of the thinner version.

I've also exported the project from Onshape in Solidworks, Rhino, and Parasolid formats and have attached them. Perhaps these will allow offline editing. I don't have access to applications that can open those files, so am not sure what is and is not included in them.