To reinforce the gudgeon bolts through the transom I used a plate of 5/16" carbon plate. Not only is it strong but it really looks good. Ok, maybe overkill but I really like the way it looks. I have all ready made a similar plate for my through bolts on my removable tabernacle. The bolts especially for the tabernacle really seem to be an eyesore. This carbon fiber will actually make it look kinda cool and not to mention a bit stronger.
I'll post the pictures of the inside of the cabin when I install it.