About this 3D model

An adapter insert for a Tayda Electronics Knob. http://www.taydaelectronics.com/hardware/knobs-38.html?p=2 I wanted to change the stock encoder knob on a Gadgets3D LCD w/encoder. I had a different knob to use and got stuck with the situation where the knob I was going to use would not fit my existing electronics. What to do? Open up Sketchup and design an adapter to 3D print, of course. I then get the features and design I want on my build. :-D