[DougD]

One thing to consider with a trailer with a wooden floor is how will you tie down your car? D-rings through plywood alone are not strong enough. Some method of connecting the tie down points to the steel trailer frame is needed. E-track that is connected solidly to the frame members allows some flexibility in hauling multiple cars and/or differing loads safely and easily. D-rings need backing plates with additional material welded in to tie them to the frame.