The rig on the MF is a German design from 1966 called "DynaRig".
You might think it won't go to weather
worth a darn, but it apparently points pretty well. Here's a quote by the owner, after the first sea trials, taken from the Doyle Sailmakers website:
"The Maltese Falcon has written a new page in the history of yachting, the DynaRig is no longer an experimental concept" is Tom Perkins', the owner, first comment to this stunning success. "Everything worked as engineered and the yacht achieved some remarkable numbers: hard on wind in 15.8 knots true, at 38 degrees relative wind angle. we sailed with no fuss or strain at 10.5 knots. On a close reach at 60 degrees relative angle, the speed (still at knots 16 true wind) climbed to 14 knots. The balance is, essentially, perfect--with weather helm never exceeding 0.6 degrees on the wind, or 2.5 degrees on a fast reach. The angle of heel was around 15 degrees, but in a puff, once touched 20 degrees. The leeway angle was well under 5 degrees (without the dagger-board in place). Since it was our first day out, and we wanted to be careful, these results were achieved with the topgallants and the royals furled--so we expect even better numbers in further tests. The maximum loading on the masts never exceeded 50% of our (very, very conservative) limit, so we have plenty of room for some even better results.
Reference: Doyle Sailmakers