Currently, I’m attemtping to build within my Underwater Condo, but there’s a huge problem. The rotation is far too jumpy, and the angles I need my things to be at is usually right in between rotations, unless there’s a fine-tuned option I missed somewhere along the lines.
There is a planned advanced build mode. If I recall correctly, it’s supposed to have full 360 degree rotation control.
Not trying to justify the crappy building system, but in the meantime, you can use the copycat tool to achieve finer control over the rotation.