Drag Knife Holder

I have many platforms that I pursue with much joy. I have added 3 D printing as a new platform which made learning more about CAD and STL file development. I have a CNC table that I use for Plasma cutting and Routing of different materials. I have build an optional Drag Knife holder to attach to the router on the table. It worked well but when I added 3 D Printing I though this is a great opportunity to develop a new holder. The process started with a CAD drawing and then moved to 123D Desi