The length of the propeller flange on the cowl was uneven, so I decided to trim it to be uniform. I’m the only person who’s likely to see this, but I didn’t like how ugly it looked (I did mention that I’m a perfectionist). I clamped a couple of Z shaped extrusions to an angle.
I then placed a sharpie against the Z shaped extrusion and ran the angle against the face of the propeller ring to mark a cut line a uniform distance back.