You want to be sure that the top of the rear bunks are flat enough for the C Dory. Generally that type of bunk is made for a deep V. I prefer flat 2 x 8 or 2 x 10 bunks, which will articulate enough to confirm to the contour of the hull, which changes in its "dead rise" from a couple of degrees at the transom to 20 or so degrees forward.. How about a photo of how the bunks fit from the rear of the boat?
Also you want either "target bunks"--one 2 x 6 or even 2 x4 on each side, near the bow, that will support the bow and direct it toward the center and align with the winch post and stop/roller near the winch. There will be little if any weight on this when you are at rest after the boat is loaded.
As it is now, you have some risk of scraping the boat on the trailer if you are off center. the forward target can be wood, tubing covered with plastic, or rollers. You don't need a lot of support forward, but you also don't want something which will not fit--and that is what you have now. The support appears to be wood, and a much deeper "V" than is present on the C Dory at that point on the bottom of the hull.
This trailer does not look like one made for a C Dory, but rather for a "deep V" hull.
