Well, all I can say is this looks way better than the fire one. Primula just doesn't work with fire BG... This one looks kinda like water, the foreground brushing is doing you good... Nice job!
Last suggestion - to make your BG look better Google some picture you think would work eith the sig and proceed according to the tutorial - put it under the brushing, and put brushing into Overlay mode. You BG is still a little empty. A few final adjustments, and your sig is gonna be excellent!
PS. Oh, didn't really read our post... Have you tried the picture version though? The corners look kinda empty, so the pic would take care of that... Or ill that up with sth else... The BG doesn't have to stand out, it's more like a fill-up for all the spots that aren't meaningful enough.