Grantmac said..
43" was a very old recommendation for beginners that keeps being parroted. 38-41" is where most freeride foilers end up.
Thanks, good to know. I like 40", in that it comes up onto the foil pretty easily, and points upwind really well, but I find the fore/aft balance pretty touchy, and especially on the short 61cm mast I need to use for much of the Outer Banks, I find myself foiling out pretty easily and frequently in gusts at 40". I'm surprised that an inch makes such a difference, but with the sail at 41", it's noticeably less touchy (so I'm not foiling out as much in the gusts), and it really seemed to make a difference in my gybe attempts. I did, however, find that I wasn't pointing upwind as well at 41" - again, I'm kinda shocked that 1" would have such a noticeable effect on that, as well.