So I built a Mid powered rocket, an dit looks like it's going to fly really well. (I have yet to fly) I had some extra tube, and so I built a replica of the same rocket, but with tube fins. I hope to just be able to swap the nosecone out and fly them both on the same day. I did not know how long to make the tube fins, so I just used the same length of my fins on the other rocket. Any tips on tube fin length?