yeah I've been thinking of shit like a tarp or a slip and slide or something as well. As for the 5 foot thang, that's pretty much what I chose too. I've built this big box thats like 5x5x5 and I think I'm going to set up the incline in such a way that I can switch it up between a couple different heights/inclines depending on how well whatever I'm using at the time works.
'Hey uh, based on what you've seen with your wife, what can we expect in terms of droopage here, are we talking about a slight slope or the full blown fried eggs hanging on a nail thing?'
-Peter Griffin (Family Guy) talking to his father in law
Ogre Posse