I like the effort you made to keep it consistently visible; a lot of games lack that.
How can you tell which orientation you have selected? Especially for the quarter-block pillars, how will you know which corner it's in?
The screens are showing what the center bubble turns into when you have the radial open. In this case, the posts that are shown are all four posts because that's the most detailed you can select in the radial. Once the radial is closed again, the middle mouse scrolls between the different posts and the current post appears in the lower left bubble. It also rotates with the camera and is centered in a "block-centric" way so that you can see where it is in the sphere to determine which way you are placing it.
I'll post a screen shot in a sec.
