Making new Boat wheels for my Sea Hopper - Part 1

My Boat wheel chassis isn't working on the Sea hopper. I need a way to move it over rougher ground whilst it's unfolded so I set about making a set of wheels that should allow me to do just that. I reference the idea I base it on in the video here on Quentin's channel. The product I based this idea on is called the "C-Tug wheels". They were just too small to cope with the Seahopper: https://www.youtube.com/watch?v=z_RGlB_5yoI 00:00 Coming up with the idea 03:02 The main chassis 05:23 Fitting the axle 09:26 3D printing the wheel stops 11:51 Inserting threaded inserts 14:49 Adding some washers