I got my parts back from engineering this week and I'm pleased with the outcome and really happy with it. I need to test it out now to see if my theories are correct. It's so small and fiddly that it could become a problem. I've also noticed that I forgot to get two parts of one of the pieces made so will need to follow this up. Even though it doesn't make sense to anyone else I know how it works and what to do with it. Overall a good outcome and I hope it works!!