Quarter window to front window paint...

So, about a month ago I put on some vinyls that connect the rear quarter window to the forward window. It was to make it look like a solid window from start to finish. I like how it came out, but I want to streamline it and give it some curvature so that it flows with the rear fender. I got the idea from two different mustangs I saw in a magazine. I was curious if anyone else has tried something similar. I want to use plastidip and knock this out myself. Your opinions on the look are welcomed as well. Thanks!