CR-10 Dial Holder Bracket Mount - larger diameter

I needed a dial indicator holder that I could use on my CR-10 with the fang fan, and found https://www.thingiverse.com/thing:2651655, but it was for a smaller diameter barrel than the one I had. I have the Harbor Freight analog dial indicator, and it has a 9.5mm barrel. I increased the barrel size to 10mm, and added a piece that you can put a 4mm diameter (m4?) bolt through to tighten it down on the indicator.

UPDATE: An M4 bolt is really tight in the clamp, but if you screw it all the way in