The hull liner on the M15 was designed for the older, like 1980s older, Thetford and similar potties. Jerry says that the first M15s have even a smaller space as the potti he fit the mold for was discontinued just after he began selling the boats. He says he did modify the mold to fit the new potti size ... though I've never been able to confirm Jerry's assertion by measurements early M15's with later build boats. My M15 had a Thetford 235 that fit exactly perfect (picture attached). DON'T go by model number alone as Thetford has changed the design over the years getting a bit bigger each time it seems. Thetford then 'recycles' model numbers. The latest is the 260 (will NOT fit) has been changed to 135 (same 260 potti just different stenciling). The older 90s & 00s 135 can be made to fit using hot water and forming the base to the M15's potti space. For 'wag bag' systems find a 2.5(-ish) gallon bucket that has the same diameter as a 5-gallon bucket. There are snap-on seats that will use the 'wag bag' bags. The 2.5 gallon buckets are shirt enough to fit in the M15's potti space. :: Dave Scobie :: M6'8" #650 :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - www.freewebs.com/m15-named-scred/ On Sat, Aug 10, 2019, 9:42 PM Rusty Knorr via montgomery_boats < montgomery_boats@mailman.xmission.com> wrote:
2. Toilet time. Granted, the Monty has a place for a Portapotty, but I use wagbags and I could NOT find a comfortable position to sit and use the head with the Fold-To-Go portable toilet I brought. Maybe I can retool this system, but so far it’s not working. What specific Portapotty fits in an M-15? The one I have is too big at the base, and I don’t think I would want to use one anyway, wagbags are great in my opinion.
