If I recall correctly, the ball trough multi ball assembly was very particular, and Nick really wanted it perfect to the point he needed a non standard machine screw that was difficult to source. Being a perfectionist, he looked for this one solitary screw in my stash of odds and ends until he found the exact screw. So this is some "back yard" project - it was always going to be a SERIOUS attempt at creating the game from scratch.
I have never seen a bag with **so** many screws in it! But we found the right one in the end - thanks mate!