The main (and daughter) board have been mounted onto a 3 mm thick plate of aluminium with 12 mm 'spacer studs' (Wurth 970120324). This assembly is now placed in the Makerbeam XL structure.
I started on the IO shield back plate, but the plate thickness was 1.15 mm and together with a 2 mm plate it did not fit into the Makerbeam XL structure which has openings of 3 mm. A plate with the correct thickness has been received.
I reversed engineered an auto-switch mouse/joystick PCB which was made by Ashcom Design and Developments. Doing some searching on the internet showed that this was a company based in the UK and that the Ashcom was a trading name for Ashby Computers and Graphics Limited. The company was dissolved in 19-Nov-2002. It also used the trading name Ultimate Play the Game and was owned by Tim and Chris Stamper. They also sold various memory expansion and hard disk solutions for the Amiga 500. More information on their companies can be found
here. Some more information on how their career path followed
[ Show youtube player ]. Impressive.