The people in the Recumbent subforum would find this thread amusing; from what I hear about those pedalboats, you do a quick seat-to-crank adjustment and you're good for a double century with no discomfort.
I worked in a shop that carried Torpados during the brief 1982ish period that somebody was importing them. The importer, probably out of ignorance of the fact that bikes in the U.S. market usually came in 2-inch/5-cm size increments, brought them in in the full size runs, meaning that we were selling bikes in one-centimeter size increments starting at about $350. We'd send customers out on a 53, 54, and 55; they'd come back slack-jawed, amazed that each 1-cm size change made a night-and-day difference. Too bad that most bike shops didn't get it. Imagine if 1-cm sizing had caught on.