Well,

I checked on-line and there are a bunch of different iterations of the Starship but if the specific one you're modeling has forward fins and you've added 20% to the tail fins, then I suggest you reduce the forward fins by 20%.

I feel your pain. I struggled with forward fins on a Spartan, Nike-Zeus and the worst, a Wasserfall/Aries. The Aries nose ended up weighing more than the whole rest of the rocket. But they flew.

You're doing it right. At some point though, you gotta start the paper and glue stuff.

__________________
NAR 79743
NARTrek Silver
I miss being SAM 062

Awaiting First Launch: Too numerous to count
Finishing: Zooch Saturn V; Alway/Nau BioArcas; Estes Expedition; TLP Standard
Repair/Rescue: Cherokee-D (2); Centuri Nike-Smoke; MX-774
On the Bench: 2650;
Dream Stage: 1/39.37 R-7