Bird Photo Booth Mount for 2" square post

I purchased a Bird Photo Booth from Bryson Lovett a week ago and needed some way of attaching it to what was once a bird table feeder - I had removed the table part and was left with a post which was roughly 46mm square. (A 2" square planed piece of wood).

In the instructions for his Photo Booth, Bryson recommends using a tripod as a support but I wanted something more permanent in the garden so that the birds could get used to it and I could fit my GoPro camera (or iPhone) as needed.

The Bird Photo Booth is described here: http://www.BirdPhotoBooth.com

My mount fits to the base of the Photo Booth using a 1/4" BSW screw and then the whole assembly slots on top of the post secured by an M8 threaded rod which has a thumbwheel at both ends. (The design of which was based on a Thing from 3D_CC_design http://www.thingiverse.com/thing:53680)

My very first attempt at using this arrangement can be seen here: http://youtu.be/LaNMRyZQzFY noting that I have since made one or two adjustments to the position of the feed tray which should give me a better view next time our Robin comes down for a feed!).