Since my trip to Alaska.
On the trip I had to buy new 8" tires to put on. The 12" wheels was to top heavy and pushed the bike along. The tongue was not level with the trailer hitch.
The shocks I had to reinforce the wood as they pushed the wood out when the lids were closed.
If I had to do it again I would make the storage box Lid 2-3 inches high instead of the 6" I used.