:) Thanks for the LOL billtext....too funny. You know, I'll have to check my plumbing, at least what I can see because it does seem like the design of the 1191 might exascerbate the issue. My old camper didn't do it, and that other 1191 owner told me it constantly happens to him. I'd like to verify the plumbing has the pieces it needs to be properly vented.
I also have to admit, the extent of my "searching" for the adjustable corks was one stop at an Ace (Meyer's Hardware in Golden for you locals) on my way out of town. Funny how many of my mods or fixes tend to be either on the road as a good excuse for a stop in a town and something to poke around with on the camper, or as a last minute stop on my way out of town. So I've neither done a complete search, nor thought about the easiest way to build one. Nice being able to just ask you guys and "cheat". The other 1191 owner asked once and felt he got shut down and didn't pursue it. I have thicker skin than that and figured someone else out there might want to know.
Bryan, as I was posting it to begin with on a whim, I thought "the first thing Bryan will do is say "go to freakin' McGulkins" since they are the last best independant hardware store I know of around here. If I really want something, or to find out what options are out there, in this area, a trip to McGulkin's is the answer. But there are also Ace hardware stores and there are GOOD Ace hardware stores. I know now that at least a good Ace store ought to have that part Whazoo showed.
Thanks for the suggestions guys.....and I hope this was helpful to more than just me!