You can now find this and more information on my new recumbent seat page located here.
I’m not happy with the seat on my recumbent trike. So let’s change it. Here are a collection of information for recumbent seats.
PDF of anATOMic Seat Recumbent Bike Seat Plans. This look like a good solution with several mounting and trimming options. I like the looks. Laminated Plywood
Here is the Barnett Williams seat Recycled Recumbents has. Wonderful seat. I’ve seen it copied in many different ways. Very GOOD. Here is a link to the fabric cover.
Ben Eadie Plans for a hard shell slat seat for a recumbent bike I think it looks cool.
Bob McCutcheon does not give instruction on this but lots of pictures. No Welding frame.
Another slat style seat. Levné SWB sedlo – výsměch laminátu I’ve not been able to translate to English. Uses wooden dowel instead of slats.
Another nice seat from Atomic Zombie user imamedik