I built two of the Sig's Bonanza, way back in the mid '70's, come to think of it, I don't believe I've kept any pictures, anyway, I built them in the V-tail configurations, they were powered by OS .60's, had to add a lot of lead on the nose, under the engine, in order to keep the CG within range. So if you still can, make sure that it balances at least close to were it is supposed to be, because if painted, a lot of weight will be added to that fuselage, they are very short nosed!
They flew very well, and very fast, I had flaps and retracts on mine, you better know how to use them, as this airplane comes in smoking, the V-tail had a lot of fish tailing, which is normal, flew very much like a pattern airplane, but if coaxed, would snap rather violently, beautiful rolls and loops. Once finished, they look awsome, but on the heavy side if you are not careful. By the pictures, it seems yours is pretty much done, but if you can, by all means make the stabilizer and fin and flying surfaces as light as possible. Good luck!

I'm sorry, I missread your question, you haven't started on it just yet, great, so by all means, if you can have the tail feather made in a built up configuration, and discard the heavy 1/2 inch sheet that they supplied with the kit, you'll be glad you did. and keep it as light as possible as you go, that plastic may not look like it, but it adds a lot of weight, just were you don't want it!