Engineer, hacker, maker, father, tinkerer, recumbentrider/-builder, spartan, GNU/Linuxer
After a while 2 kids need to be transported and all should be able to push it. Was some modification to the orgiginal parts and a new middle part. 3.5m total lenght, 2.5m wheelbase.
Built just another 2nd half for the tandem to have a transportation option my (at that time 2 year old daughter). Just detach the back half and attach the kiddy part. Since the front part is front wheel driven, this was a 2-day hack.
Built as an race tandem together with a friend. Nice feature is, that because each rider drives the own wheel, that there is a coupling in the frame, so you can separate it in 2 parts.
An ikea hack which converts the table, which is vertically adjustable using human food pedal power. Using mostly parts found in my tinkering basement.