Playseat Challenge Shifter Mount

## Description
I couldn't find a Logitech shifter mount on Thingiverse that satisfied me, so I made my own in Fusion 360. Note, I have only tested the right-hand version of this mount, however I expect the left-hand version will work fine. I just mirrored all of the components. There are 3 parts required for this print; the inside bracket, outside bracket and the surface to which you mount the shifter. The surface is designed for the Logitech G27 shifter, and I expect the other similar shifters. I only have the G27 to test.

*Update 6/26/2019
I've confirmed that this works fine with the Thrustmaster TH8A shifter using the provided clamp. It's secure enough, and positioned well enough, that I'm not going to bother making and reprinting a hard-mount plate for it. Much better shifter than the G27/G29/G920 variants by the way.*

There were a few main goals for the utility of the mount:
1. Securely mounted without the fear of it shifting
2. Extends back towards the seated pos