Hi Tom
Not sure if you meant to start new thread or join in on the thread below

http://www.talkmorgan.com/ubbthread...tonneau-cover-on-easy-up-hood#Post745671

Anyway, I drive a lot with Tonneau cover fitted and I had same problem as you.

I made up two leather straps that I use when the Tonneau cover is stowed- either driver side only or with passenger.

[Linked Image]

The secret is unclip the rear stud, raise the cover side to be stowed vertically, neatly fold in the drop side by tucking cover in from the rear, and then tightly roll the cover at the correct angle that ensures that it is parallel with the back bulkhead.Tuck it behind the seat and then importantly raise it as high as possible under the top edge of rear bulkhead . Then then secure with the strap. No problems with seat belt interference. See the cheapo mod I did to secure the remaining tonnaeu cover side in the other post. With one or both side retracted the straps are in keeping with the overall look of the car (even if it is a bit "bondage")

hope this helps
Ian