Here's a photo of my Prindle 18 fitted with a Baby Bob float. I haven't gotten it wet yet, so I don't know how well it works. Maybe we'll test it out in a couple weeks down in Key Largo. We mainly sail in a shallow lake, so our main concern was keeping the mast and sails out of the mud.

Jack Hoying
Fort Loramie, Ohio
Prindle 18 #1645
http://www.bright.net/~jmhoying/sailing/prindle.htm