I have been using the Green Hornet fairly horizontal, so I gave it a go closer to 83%.
The full adjustment would have it at 2.3 mtr, but I've taken it in to 2.4mtr at the moment and nearly all the squeeze is gone. So I will play around with that for a while.
I still want to have a go at an 11 footer though. I have been loitering around DIYsupply since yesterday, but I've got nearly $100 worth in the cart !. I tell myself its to make the shipping cost worthwhile.
Maybe I should go to a local haberdashery and just grab 4yards of whatever to try out first.
Thanks again for all the input so far.