Watched the video. All his zoos seem larger then mine. The heads on mine are very small, but I have over 200 heads.
The same principles apply.
Zoos are quite resilient. Just cut between the heads, getting as much of the mat as you can and they should be fine.
"as much of the mat?"
The video shows he cut the stem as low as possible without touching the main base. Is that what you mean by mat? Of do you suggest cutting the base in sections.