Ok, new to this -- and I have searched -- but I suspect there is a detailed post in the forum here somewhere on this topic. I am wanting to build a rocket from scratch, but it seems like I will need to create a main body that has various diameter along the length of the rocket. So, not just a single transition from one BT size to another BT size with the nose cone completing the transition. How -- basically -- might you tackle the construction of the attached? And I have to say, I could do this with 3D printing, but I would prefer to have to construct the parts and pieces myself from available materials.