The flat areas, (besides being areas to mount vents, etc.) allow the curve to be pushed outward and increase the volume inside. In actuality, the only time that the flat areas could have standing water is when I'm set up to sleep inside. Any other time I'll intentionally leave one tire or the tounge either high or low to prevent standing water.
The 2+2H profile is actually where I started, but I wanted to lower the back and have the hatch extend all the way to the floor (too much "hook" in the 2+2H for a full hatch.) I also wanted more volume in the upper front corner (AKA Benroy) while retaining the "Cub" profile.
Tom: Thanks for the support ... I was wondering how many feathers I would ruffle by putting flats on a cub profile, hence the "modified." And if the dimensions and notes weren't on the drawing, no one would know that they're there.
GregB: I've spent quite a bit of time between Kingston Troughs and Manning Meadow ... I know the area well. I feel privelidged to have the opportunity to live where I do. BTW - The door's always open when you're in the neighborhood.
Corwin