Hi All:
as someone who runs a SAAB C900, I'm rather a sheep in sheep's clothing, here! However I found your very interesting thread because I'm about to replace the rag top on my convertible, and I also want to put a tonneau cover on it. You've no idea how good it is to find a forum where "tonneau" isn't preceded by "truck"!
I've run several sports cars (MGA and TR4) and found the tonneau most useful (cuts down on draughts and increases cabin heat while driving topless in the winter) as well as keeping seats dry during unexpected showers when parked. (I live in Canada)
The SAAB has a two piece top, ie it has an un-zippable rear glass. With the side windows down, I never noticed anything being sucked back into the car through the rear opening; cruising speeds about 135kph.
Both sports cars had similar hoods to those described in the thread, and there are some good links showing different methods of attaching hoods to body.
http://books.google.ca/books?id=umdq...sult&resnum=20
the above link shows tonneau and hoods clips used on Healey 3000 cars
http://www.mgexperience.net/article/...70-softtop.pdf
this link describes the soft top for an MGB, with a steel strengthening strip in a pocket at the rear of the hood/back of the tonneau, that latches into (typically chromed) tonneau/hood retainer fixed clips (no moving parts) on the deck back of the cockpit.
Here are two pics of tonneaux (Healey 3000 and Jag?):
http://www.topsonline.com/images/faq/faq10.jpg
This link is to a US supplier of tops for AC Cobra:
http://www.topsonline.com/index.php?...modelID=407000
This link is to a US distributor of Vicar Fasteners (including Tenax and black fasteners):
http://www.aro2000.com/vicar_fasteners.htm
Hope that some of this might be useful to someone. I've very much enjoyed reading this thread!
Saabreur