About this 3D model

This is a mounting system that i have been working on for mountign screens and tablets in my boat. I am using these camera arms in mine but you can mount them on any 1/4" thred. https://www.amazon.co.uk/Sinvitron-Magic-Monitor-Pliers-Camera/dp/B011769YUM/ref=sr_1_1?s=computers&ie=UTF8&qid=1480812728&sr=1-1&keywords=camera+arm