Hi Darryl,
Thanks for your comments. What you just described is that the tumble home hull shape has its highest "fineness ratio", lowest wave making shape, up near the deck or at the top of the hull. This is the same hull design logic that went into the Super Cat family of beach cats back in the late 1970s. Look at the picture of the SC20 on the first page of this forum. The leeward hull has just gone underwater at the bow and "no problem". The boat keeps right on ripping; no abrupt slow down, no pitchpole, the sailors are obvisously not concerned. Speed and safety characteristics combine in the same hull shape.
Thanks again for your comments.
Bill