So I still haven't had the chance to take my video but it will happen soon! In the meantime I thought I'd just share on the progress of the sentry gun that I've been working on in preparation for the Maker Faire this weekend. Up to the stage now where I need to add the electronics etc, which I'm planning on getting done tonight. I'm really pleased with how it's turned out so far. The center of gravity is nearly spot on (a teensy bit top-heavy but certainly good enough) and the movement of the sentry is extremely smooth thanks to a 500KG bearing and some nifty design work. All panels were cut out of 10mm PVC foam which is super strong for it's weight.

Video of it in action here.