Not me, a friend, and yes he has the hammock seat. Fantastic machines.
I don't really get too involved in scientific gear, the odd genrator/motor, but nothing too clever or precision. Often I get 1 or 2 days only so it's cheap and cheerful stuff. The most difficult ones were 4 days to make a demonstration model of Newcomen's atmospheric engine, and a recreation of the first patented freezer, pumping ether (sniff sniff!) . TV people have odd ideas. The producer decided to film the freezer in the greenhouse at Kew Gardens on a very hot day in mid-Summer, and was vexed that after a minute's pumping no ice had formed! Numpty. Even the best modern freezer would struggle in a glass house, and this was a creation of a design which was never made because Perkins realised that it would be too much work to hand pump it! His mark 2 WAS made, powered by a steam engine. Fortunately for me the presenter ( Adam Hart-Davis) does have a BSc and was able to defend the machine's failure to produce ice within one minute in a green house!
For the Newcomen they wanted a Perspex cylinder so steam would be visible, and the jet of cooling water. Fine, great...steam is 100 degrees, Perspex is rated to 95. What do they want me to do in a few days, invent low temp steam? It did work though...just!