I guess you've looked at my aero cap thread?
http://ecomodder.com/forum/showthrea...dea-15137.html
Compared to my cab high topper/camper, my first version did improve a little on the MPGs. Once I tapered the sides towards the rear, the MPGs did improve more.
Making a hatch wasn't as easy as one might think. There's support, weather seals, latching, weight, flexing, and fit.
Is this yer daily driver truck? Being that mine is my daily driver made it rather "fun" to git certain phases done before I had to pick up my son at school each day.
Is security one of yer goals fer yer aero cap? It isn't one of my current goals fer my testing phase. Makes it easier to keep things out of the truck bed.
Does yer truck have a rear sliding window? If so, are you going to have access to the bed through front of the aero cap?
My current aero cap weighs about 50lbs (just a guess). I'll be taking mine off later this week so I can revamp my stake pocket brackets. One of my goals is to make mine into 4 sections. Hatch, front frame, and both sides. Should make it easier to take apart and store if I need to. I know I have to install a brace on the back end so I can take off the current aero cap in one piece.