Clever thread title.
The transition from the cab to the bed cover is important, your cover while I am sure is much better than no cover is at a significant disadvantage due to the abrupt transition from rectangular to circular directly after the bed. If you re-work it at all, i would suggest trying to make the initial pieces right behind the cab basically come up almost vertical off the bed sides instead of initially coming in before curving up. Then as you go back you can start to lay them down more as you go.