Post Photobucket reboot continued..................Here's the 'Mohair' offcut:

Very little science to this. A simple rectangle with the rear corners sliced so they don't protrude. It's single thickness, so a bit flimsy, but I'll look into that again when I get some more aerosol glue.
The front corners are held up by short straps onto the hood side rails, using one of the studs each side normally used by the hood when it's up.
I keep a small stock of hood fasteners (for emergency use), so this has cost nothing.........well, today, anyway.

Compare the next two photos with those above without the half-half tonneau.


Well, the prototype windstop has needed further development. The original 4mm perspex was a tad too flimsy so I've upgraded to 5mm. I've also developed some improved brackets.
This is how the prototype (4mm) ended up, after trimming with IRS0826 courtesy of COH Baines Ltd. I couldn't get used to the raw edge, even though it was polished..........

These were the final Mk1 brackets. Note the neoprene buffers......


This arrangement worked well, but not quite well enough.
If anyone would like to try this prototype, and we can meet up next year, you're welcome to give it a try. It works with big rectangulat head restraints - but I'm not sure how well it would cope with the latest elegant restraints....
More to follow.....