I was going to go with Peragon but then realized that you can’t fold the cover down when you have stuff in the bed. Like if you pack the bed with gear. I’m going with either a Roll N’ Lock or a Bakflip rolling coverI can't decide between retrax and peragon. But that's not what this thread is about lol.
Interesting results! I've seen wind tunnel tests and others saying it'll improve efficiency, YouTube has several, but then there are others saying it won't. /shrug. At least I haven't heard any saying it will significantly decrease range in anyway in any case.