Randy, I have a 2009 M-15. The Thetford Model 135 fits in my boat snugly and securely. The board to complete the v-berth will fit on top w/out interference if you push the PP all the way down in the "well" area. BTW, I use some of that rubberized shelf liner to make the fit even a bit tighter than it would otherwise be. Mike M-15 La Pequenita #654 http://www.thetford.com/HOME/PRODUCTS/PortableToilets/PortaPotti135/tabid/16 3/Default.aspx -----Original Message----- From: montgomery_boats-bounces@mailman.xmission.com [mailto:montgomery_boats-bounces@mailman.xmission.com] On Behalf Of Randy Watkins Sent: Monday, August 30, 2010 8:09 AM To: Mboat list Subject: Re: M_Boats: rowing an m15 montgomery_boats@mailman.xmission.com. Hi Fellow sailors, A couple of questions. We have a 2003 M15, "Becca Anne". 1. A porti-potti for this Model? Which model will fit the newer M15's? 2. rowing- I've thought about adding side mounted oar lock sockets and oar locks and wondered if anyone else has dome this project? Regards, Randy W. Texas jazzmanrandy@hotmail.com _______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats Remember, there is no privacy on the Internet!