Hi Bmb 779
I donít know your boat or set up ..but I winch a 150-200kg SIB onto my trailer..and it is a hefty pull. It would most certainly rip my D rings off the PVC if I attached to them.
I attach a rope to the transom eye on the outside of the transom.. run the rope up the side and under the boat to the front.. pass it through the winch tape..then run it back under the boat to attach to the transom eye on the other side..if that makes sense.
It means that when I apply pressure with the winch..the rope helps a little to lift the boat onto the trailer..but more important..the transom is taking the weight and not a weak D ring.
If you cannot find a way to secure a bow eye onto the rigid hull..try it that way..you may find it works well for you too.