Fallout Power Armor Fusion Core Wheel

The wheel (ring?) on the back of the power armor. I needed it for my power armor suit I'm building, and wanted a more perfect circle than I can cut. The arms are a bit rougher then I would like, and I correct these by hand after.

Sized to fit ManEatMoon's Fusion Core https://www.thingiverse.com/thing:2294091
His core will JUST slide past the widest point. I use XTC to smooth both the core and wheel, and now it fits tight at the widest part.