Tried it too. But unless you are using some kind of Vector Graphics Software to create your images, they don't come out anywhere near as good as FPG. I did the Stormbringers both on my own and through FPG, and three guesses which set came out better. And it wasn't even close.
Caz
Unless I'm submitting models or figs for competition, I don't even bother with decals. When I used to build model aircraft, I would airbrush the larger insignia, using custom templates, because no decals could match the look.
Russian I-185 with painted insignia tangling with Japanese Zeroes (Game: Mustangs & Messersmitts):