Matt:
Beautiful job on the boat (and clever wheels/trailer as well).
Congrats!

Did you pull the boat+wheels with a bike or car?

I'd also like details of your deck fittings, please.

I had to get to a place 12Km from the workshop so I needed something for the bike (don't have a car). It might look fancy but to be honest it's far away from perfect:
- plywood is too flexible for 26" wheels while cycling, the thing might be stable but wobbles considerably. it's also quite heavy.
- I made a plywood hitch for the bike and connected to the kayak tip with a cord. A stiff connection would be a lot more comfortable as it reduces swinging.

My original Idea was to use an aluminium tube with foam pad stuck on and a wheel on each end of the tube. Unfortunately I was unable to find a long threaded rod with the same thread count to replace the two axles of the wheels.
However I also noted that a slightly lower centre of gravity and maybe some simple kind of suspension would improve overall performance considerably. I'll have to ponder over this a little more…