I see tne OP's dilema... The Hartley web site offers very little
information about any of their [sailing] designs. Where - for example
- is the most elementary design information? Beam / Displacement /
Draft / Ballast / LWL ... "Sure, I'll be happy to pony up $250 for
Hartley 30 plans based on the two fuzzy pictures of the Accommodation
Plan and a few non-discript photos of hulls in progress!"

MW