Looks to be a significant improvement over the FRP design. Rolls up much smaller, but that may be good or bad depending on how good the material is - the FRP material is very thick and heavy duty.
I know you mentioned a bungie drawstring around the bottom edge and some buckle straps under the lid, but in high winds some velcro straps that attach around the legs up front, the hinges in the middle and the latches at the rear would be real helpful and easier to use than cords, ropes or straps IMO.
The fabric is about t same weight but the coating is heavier. Final fabric selection is TBD, but it is comparable in weight to the FRP fly and probably better quality.
It packs tighter, I think, b/c the battens come out. Regarding Velcro and alternative attachment options, I think Karl will stick with the loops, bungee, and ladder buckles. He may consider adding custom options for a few extra bucks, but to keep costs reasonable, he'll keep it simple.
Lastly, mine does not have windows. I plan to add them to mine. Not quite sure how Karl will be pricing these, but windows may be more expensive. I know it will make the fly heavier and bulkier.
