Multiple revisions of holders to present skateboard decks are available. The bottom holder can be used for the aluminum extrusion and the shelf mounting variant. For the aluminum extrusion mounting, there are a number of different holders to keep decks of different length. In the shelf mounting the decks are leaning against the back wall. The designs have been done in Onshape, the documents can be accessed [here](https://cad.onshape.com/documents/8feabc3e75c155daa617a946/w/cb4ed694c88280f65f42429e/e/86ad757f512735ffaad492af)