From the Stealth website:
F18HT built in the late spring will arrive with our patented canting rig, all F18HT delivered prior to this already have inserts in the hulls to accept the fittings to retrospectively fit this and customers have the option of bringing the boat back to have the new kit fitted at no extra cost.
Stealth's upcoming A-cat apparently will also have canting. I know the big trimarans use canting rigs; I've seen photos of some experimentation with beachcats. Will be a first for a "production" beachcat? Anyone know how this works. Perhaps John P. could share some of the theory and function...