If I'm going to do a glyph, I'd keep the sail basic and tan and then paint the glyph using the colours Cav suggested or go with one of the transfers.
If I'm doing the web pattern on the sail, I'd leave off the glyph, as it would be too busy to have both.
I've done a few tests with the pseudo stencil I found and I'm not loving the pattern results. It would be be using different colours, having the background pink and the foreground black making the veins pink, but I'm not sold on it. I think I need to get a much finer stencil if I'm to pull it off.
So I'm back to the idea of using just the glyph. Do I use a pre-made transfer and thereby lock into a preexisting kabal or do I paint an original and stick with my new kabal?