I'm trying to create a hair braid pattern on a circle and somehow can't seem to change the spacing between the shapes in the brush. I want to close the gaps. I'm working in Ai CS6.
Your question is a bit cryptic (you should make it better even if this answers your question). But here is by guess of what your asking:
Your trying to do a semless pattern brush but your experiencing that the pattern does not repeat properly. That is because the pattern is taken from the bounding box of your graphics.
Image 1: there is small but noticable gap where the patterns meet
While you would like to have no gap
Image 2: There is no visible gap where patterns meet.
You do this by placing a no stroke no fill rectangle behind your graphic before you make it into a pattern.
Image 3: Make a non stroking non filling box behind to bound what gets drawn out of the pattern.