Hi All, Just visited the WW Potter Trailer Sailer Forum. They are having a pretty good discussion on autopilots. Go to: http://bbs.trailersailor.com/forums/potter/index.cgi I recall one of the Potter 19 owners (months back) who commented he was having directional problems at one time with his autohelm. Problem was corrected after he found the large magnets of his aft speakers was causing some interference. So, don't drill holes in the cockpit for speakers (like you would anyway) they may cause future concerns. Also more info on Autohelm installation at the bottom of this site... http://www.jscheetz.com/sailing/SailBoatMods/index.html AND... more Autohelm ST1000 info at Judy Blumhorst's site (lots of good info) http://www.blumhorst.com/potterpages/index.html Also, in the thread on the Trailer Sailor site is information on people who have installed the Autohelm on their Potter 15. So... it must work on small boats. However, I'd imagine it would be cycling alot on a boat without the directional stability of a weighted keel. So, it's my uneducated guess, it may actually work better on a M-15. If anyone does the modification... take lots of large, high resolution pictures so I can put them on the Photo Site, for all to see. For me, when I see someone else has done a project, it gives me the confidence (courage) that I may be able to do the same. P.s. I just got a CD in with lots of photos of lots of projects. I'll be adding more to the Photo Site ( www.MSOG.funtigo.com ) in the next couple of weeks. Bill M-17 "Tipperary" SF Bay