Well done video! Thanks for not editing out the on the fly changes. I will remember the tip on Fusion doesn't like too many bodies, now I know why my computer would freeze up.
You can streamline this a bit by creating a tangent plane on the front of the cylinder and then draw a circle on it and use the pipe tool to create the torus shape as a cut extrusion. Then use the array tool set to feature to replicate that.
Yeah there are many ways to create your tool to cut the cylinder. The main thing I was trying to show was creating planes 18 degrees apart (360/18 = 20) so you can use those to "stagger" your pattern around the cylinder. This was an "off the cuff" tutorial, so it's not very polished! Thanks for the comment!
