Thanks for sharing those photos Gil, it is good to know they can scale down well. How many inches of mercury do you get on those triples?, assuming you run them on steam and that you are able to hook up a vacuum gauge to the condenser?. Agreed with regards to a steam launch as you have a nice body of cold water to act as a very effective heat exchanger.
I'd love to be able to make a working condenser that i could hook up to my Jensens or Stuarts to play around with, one day my dream might happen.
On the subject of condensers, i found this project fascinating:
https://the-condensing-engine-project.com/I also found a nice video where someone had made one of Watts early experiments as a working model: