Third fin is on, completing step 10 from the first post. Again no picture because it looks the same as attaching the first fin.
I also completed step 9, though, cutting the short (1.375") slots in the coupler to fit over and lock into the fin tabs. This will allow the coupler to extend deeper into the tailcone for additional overlap.
It turned out to be much easier than I expected: I clamped the coupler down, clamped a vacuum inside it, and slowly cut them with a Dremel plus 3 stacked cutoff wheels. Thanks to @Pem Tech for the tip from 13 years ago!
I will check the fit tomorrow after the third fin cures. I did forget to mark which slot on the coupler went with which fin slot, so that will probably take some trial and error (and sanding).
Next big steps are internal and external fin fillets, though I'm just now thinking external ones maybe should wait until I attach the fin can to the airframe. Any opinions there?
I also completed step 9, though, cutting the short (1.375") slots in the coupler to fit over and lock into the fin tabs. This will allow the coupler to extend deeper into the tailcone for additional overlap.
It turned out to be much easier than I expected: I clamped the coupler down, clamped a vacuum inside it, and slowly cut them with a Dremel plus 3 stacked cutoff wheels. Thanks to @Pem Tech for the tip from 13 years ago!
I will check the fit tomorrow after the third fin cures. I did forget to mark which slot on the coupler went with which fin slot, so that will probably take some trial and error (and sanding).
Next big steps are internal and external fin fillets, though I'm just now thinking external ones maybe should wait until I attach the fin can to the airframe. Any opinions there?