Regular readers can tune out now, as they have heard me before.
Weaver and Seawise are great for lightweight dinghies.
I have a Caribe 12DL, 750# all in, Honda 40 on the transom. When I got it, the boat it came from had it on a Seawise system. The weight of the dinghy, especially the stern, was too much for the Seawise brackets. They survived, but the parts of the dinghy they were attached to did not.
In addition, you need to equip your dinghy with an AGM battery as it gets tipped on its side for storage.