Each stage only needs one support if mounted as shown in the picture. But the mounts are designed to be unobtrusive if mounting the rocket horizontally, though the larger stages will probably need a second mount to support them.
Stage_1.STL | 72.0KB | |
Stage_2_V2_Snug.STL | 49.8KB | |
Stage_3.STL | 47.3KB | |
Stage_4.STL | 46.7KB |