This is a dutch copy of the Libre Beach Runner!
http://www.beachrunner.net/eng/Index.html Newer Version with the Mast more forward.
Many of the senior citizens in Denmark/Germany switched to Beach Runner from Sail Buggy
www.landsegler.de/sail-kit.htm Faster and easier to get in and out, no Maststruts at the Sides, like Manta. I guess, some bought it cause of the nice Seat…

Newest Desigm from Libre is Beach Glider, Sven rode it in Smith Creek, YOTT-Mini. There is a version with a sewn, collapsable full length seat instead of fiberglass. I had the chance to give it a test-ride. Pretty fast, but i didnt quite fit in cause of my 2meters

Theres only a few builders here, more consumers...