Are you trying to say it looks like I made the design up as I went along ? If you are, I don't mind, I prefer honest opinion. The design is actually quite close to my original idea. There have been a few tweaks along the way, it is my first attempt, and there are bits dictated by my abilities ( or lack of). There is a large pile of bits of tube etc that didn't come out how I wanted, probably enough to build a crap version.