Thank you Chris, glad I'm not the only geek that loves robotics, I think it all stems from my interest in computers, 1980 I bought an Acorn BBC micro 16 k ram, then I added 16k extra ram, a sideways 128k rom board a disc drive interface and learned BBC Basic coding. It was incredible new, exciting my 3 children were weaned on the space adventure ELITE, and thousands of games on audio tape. Zonic the hedgehog was my kids favourite.