Seeking Lath and Plaster Demo Advice

I need to remove a section of lath and plaster ceiling-- a three by six foot rectangle -- in my kitchen to allow repiping my upstairs bathroom in this 100 year old house.

I have someone to do the repair work after the plumbing job is finished but I'm doing the demo myself.

The plan it to use a circular saw to make the cuts.

Here's my question: I understand that this old material tends to come down in big chunks. I'm wondering if there is any advice or experience for keeping the hole I'm making under control.

One idea is to use jacks to support some 2x4 blocking around the perimeter of my planned opening.

Any thoughts?

I'm not looking for advice about asbestos abatement, dust control, etc.