Yeah, I dodged the question....
I'd say the main thing is to go to
ecomodder.com/forum/member-beate.html and create one or more albums and populate them. That sort of becomes a ground anchor.
Look at the Threads and Posts columns on the main page. In order: Central>Aerodynamics>The Lounge>General Efficiency>Fossil Fuel Free>Instrumentation.
Search is your friend.
ecomodder.com/forum/google_search_results.php?...&q=HPV...
As a result of that search it looks like an under-utilized feature is tags.
www.google.com/url?...&q=https://ecomodder.com/forum/tags/trike.html... A dozen occurrences between 2010 and 2016. They are available [up to 5] in the new thread editor.
All the above is subject to potential error. I'm being driven from the house by a need for groceries.