Too many hobbies, not enough time.
I'm an electrical inspector and spend my working time training electricians to install electricity smart meters throughout the length and breadth of New Zealand. Before that I owned and ran an electrical contracting company for about twenty years and before that I taught apprentices and technicians and Manukau Institute of Technology in Auckland. I have several trade qualifications in electrical fitting, advanced trade electrical and NZ Certificate in Engineering: Electronic and computer technology and once worked for a company designing electronic and microprocessor based products. I have restored a dozen or so Volkswagens plus almost as many classic motorcycles. I build gravity racers, caravans, trailers, electric bikes, make lead-light windows, paint and do mosaics, and I design and build 3D printers.
I have built 15 or so 3D printers starting with several Mendel Prusas and a mendel max before designing my own prism style printer I call the OB1 from open beam 15x15mm aluminium extrusion. I developed this further into my second printer the OB1.4 and have published all these designs but I am still using my trusty OB1 printer for all my 3D printing needs. I am now building a larger 3D printer from 20x20mm extrusion that will have a build area of 300x300x300 (1 foot x 1 foot x 1 foot) and be fully enclosed and portable.
3D printer movies: http://www.youtube.com/user/wiredkiwi