Delivery came through from reprapworld yesterday. Stayed up and fiddled with Pronterface and Sprinter firmware and managed to get some movement from the NEMA-17 stepper motor.
I also have second thoughts on the building material of the chassi, mdf board and quality I can achieve with home tools is just not up to standard. I’m planning to order some laser cutting services in acrylic from a local advertising/promotion firm, when I contacted them I was surprised that the price was reasonable.
I will post a new version of my plans as soon as I can.