Looks good Plum. That method is woking well for you. I just have one question. I noticed that one engine nozzle is open, while the other is closed, like you see on A model F-14s with the P & W TF-30 engines. Are you modeling a specific aircraft that you saw like that? I'm very much an F-14 nut myself, but I have never seen an GE engined F-14 like that under normal circumstances. Having said that, your model still looks good, & this is a hobby where you can build your kits how you see fit.
If you ever visit Modeling madness.com, I've written a few F-14 decal sheets reviews, for I also have more F-14 decals than I can shake a stick at, going back as far as 1989.
Look forward to seeing it finished.
Chris Ishmael