Booling away the shared space between 2 solids, while 1 is moving along a path

[expensive.but.simple (Simple)]

Hey
Is it possible in Gh to somehow grab all the space which would be shared between two solids, when one of the solids completes a possible path? I want to perform a solid difference with this space.
For explanation:
Imagine a milling process. I want to have the final workpiece, when the router-bit finished all the paths on a stepwise turning cylinder.

[diff-arch]

Hi,

Yes, this is totally feasible, check for example this out:

Solid Difference

I was getting an “Invalid Brep” until I added a little room by making the box bigger and moving the ball cylinders slightly. Made a few other changes while I was at it… [ball bit_2020Aug31a] ball bit_2020Aug31a.gh (461.9 KB) Adding an extra SUnion reduces the Profiler time. I have no idea why these files are so large!? [ball bit_2020Aug31b] ball bit_2020Aug31b.gh (461.5 KB) Notice the increased Profiler time without the two intermediate SUnion components: [ball bit_2020Aug31c]