DaveW that is exactly the way my dealer showed me how to do it. Thanks for posting this as I can refer back to it when I forget.
Same for Me but where Dave uses Pipe insulation I use a Full Length Folded Over to 6ins wide and then stitched around Hand Towel
With reference to Folding the Toneau, I've just posed this from our R100 Site on Moganatica
https://sites.google.com/site/morganatica/dances/folding-a-morgan-toneauI hope your finger is ok.
On the trip I skinned the same finger many times. I found it was the sharp edge of the Under Scuttle Liner which protrudes about 1mm below the Dashboard. This was happening when I changed gear. I started wearing my driving gloves but one of the holes fell in the same spot. Final solution was keep the Plasters on.

Which reminds me I still have to fix that sharp edge