Boarding ladders and their installation was a recent topic on the TSBB Potter board. Here is a link to the relevant thread. http://bbs.trailersailor.com/forums/potter/index.cgi/noframes/read/59731 It seems that the Potter ladders are manufactured by Windline, but a customized version is made for International Marine, the builder of the Potters. This version is apparently narrower and also features reversed mounting brackets to accomodate the narrower transom. Given that some previous M-boat owners have installed ladders purchased from IM, I thought this might be of interest. A permanently mounted boarding ladder is not just a luxury on our boats. Jim Desnoyers Ketchum, ID