Good morning!

So I'm designing a custom business card holder for our secret santa gift exchange which I'm going to print out. Because of odd overhangs, I need to slice this object into 2 pieces that I can print separately.

For some reason, I can't figure out how to use the highlighted closed loop to create a slicing plane. It only seems to want to work on an axis.



Any idea how I can use the highlighted closed loop to act as a cutting tool so I can separate the pieces?

Thanks!