So I've been approaching this project from a bit of a tangent, with the engineering sector strikes in South Africa I couldn't get any laser cutting done and it brought my prototyping to a standstill. As a result I decided to pursue a smaller project that I've been wanting to do for a while now which is a small CNC plasma cutter. It has a small 1,2m x 1,2m bed and is powered by an Arduino sporting a modified version of Grbl. It's all just about done and if I get time I'll start another project and do a write-up on it. I'm hoping it will significantly improve my ability to prototype parts for all of my projects.
All in all I hope to get back to my arm and have some interesting progress to show soon.