Re: CleanMPG Previews the Extang Trifecta Tri-Fold Signature Series Tonneau Cover
My experience with tonneau covers hasn't been 10%, more like nil. I leave mine off nowadays as the truck is used for hauling gravel, firewood, etc. mostly anyway. The additionaly drag by the Loadhandler is far outwieghed by it's extreme usefulness and is almost undetectable in MPG penalty anyway.
For a tonneau cover this item sounds like a really well thought out piece! The threat of leakage is always a factor with these, hopefully they have it whipped.