I'm doubting the 5.2.
The stripe is too low and the 5.2 didn't have it on the inside of the hulls. This one also looks like a pregnant guppy between the trailer cradles. I don't think the 5.2 had that volume.
The boat could have sat in the water and that stripe is literally a water line. Hull shape and size look right to me for a 5.2 - the separate traveler track is another dead ringer.
