So I didn't quite do what I had envisioned for it but I think this will work out okay. I had originally planned to blend from the back of the bubble up to the front part of the hatch but I decided that I wanted to be sure that the fuel tank was going to have all the clearance it needs to sit parallel to the centerline.
If I'm not completely mistaken, the Yak 54 is a two-seater, so the front bubble can be a panel for the front and I'll stick the main panel behind with the pilot sitting near the back plate.
Anyhow, here's a couple pics:
