Rod, good luck with your project, I'll be following as you go. This forum has a good deal of traffic, but not a lot of folks that post. So I thought I'd stop in a cheer you on. And to pass on a shameless plug for my leftover parts.
I have a stash of leftover parts from my project, (lots of stuff that didn't fit in to a re-design or just change of direction. If you could use any of it, I'd sell it at a loss, most of it was purchased in Elkhart at RV surplus stores. Maybe over the weekend I'l lay it all out on the floor so I take pictures.
some of the hightlights,
2 new matching gray/black tanks agout 20-30 gallons each
a fantastic fan
a box of 110V RV style electrical outlets
a fold out handle to attach to the outside for stepping up into the door
a funky flat panel tv mount
theres more just things off the top of my head.
Any way if you could use any of it great, if not thats ok too.
again good luck with you project, I hope it goes better than mine has.
-blizz