When I bought a copy of Classic and Sports Cars magazine back in the early '80s with the article about the Vauxhall Design Department I noticed that Silver Bullet had it's gutters filled at the front up to the top of the screen. I immediately decided that my car would have some of that!
Here's Bullet photographed at Billing 2011
The fact that the screen pillar bottoms were rotten and it was as easy to fill the gutters as try to get the shape right in the gutter was the deciding factor.
So here it the photo of the result.