I tried. I worked on it for about 30 minutes and then just gave up. Printed ABS is actually surprisingly difficult to file/sand, it's rather tough stuff. I fi

I tried. I worked on it for about 30 minutes and then just gave up. Printed ABS is actually surprisingly difficult to file/sand, it's rather tough stuff. I find it's easier for me to file 6061 Aluminum than it is to file ABS. And as this was a piece with a ~3 inch diameter, and many skinny, flat internal angles, filing wasn't successful.