My problem with the centre block was that the edges were too rough and unbalanced and I was going to have serious problems trying to get the edges aligned with the next round’s border; this aside from having major nips of the end star points. I was going to just leave it as it was and just deal with it but when it came down to it the whole thing was just too wonky.
What I decided to do was to take apart the four blocks and surround each block with a border. My reasoning for this was that if I needed to trim to make the blocks more balanced then it would be easier to take it out of the border than the actual block. As it turned out with the minor fudging of putting on the borders everything seemed to work out. You note I said “seem”, I guess I’ll find out when I attach the next border.
Centre block after putting on borders. Click on picture to enlarge.