In article ,
says...
http://www.timhunkin.com/94_illegal_engineering.htm

Might not solve your problem, but fun. There's lots of stuff on the web.

Tim Hunking is my hero! Well, not quite as much as Rex Garrod - I must
take him up on a long-standing invitation to visit his workshop.

Secret Life of Machines should be used in school.

--
Skipweasel - never knowingly understood.