The reason Keystone won't release them, IMHO, is that they don't know for sure. Just like the electric all rigs are similar, but not the same. Just look at the number of responses when you ask what tank the washer drains into. Some go into grey 1, some grey 2 and some don't go into any tank at all.
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
2017 3500 Dodge Maxi DRW 4X4, Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, etc.