Softball Dad,
Got a friend to look at this and he says that unit is badly outdated. Found another unit that sounds promising. Friend is looking at it to see how simple it is to build and at what cost. This will take a while to investigate, so be patient.
From the looks of things, I may as well buy a spot of land somewhere and park my TT on it and call myself camping. If gas continues at current rate, I'll have to walk to where ever I park the TT.
Mickey