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On Friday, 31 July 2020 20:19:03 UTC+1, Rod Speed wrote:
Fredxx wrote

What's the best way?

The appropriate blade in a hand held circular saw.

Not cheap tho if you are only doing that one cut.

The original sheet was cut by saw, but is there an
alternative way for cutting out a small sheet 3ft x 2ft?

I assume it would require 100% backing for the cut.

Nope, not with the right blade.