I posted a query last week about cutting a straight line along plastered
wall with gypsum lath with a concrete block wall about 3/8" behind it and PT
furring strips in between, and it was chewing up the blade and someone
suggested using a skilsaw or jigsaw. I have not tried it yet but a similar
problem is happening on the ceiling where I need to cut circular holes for
recessed cans.

The ceiling is also plastered over gypsum lath so overall thickness is about
5/8". Will a normal hole saw work or I need special diamond blade hole saw?

Thanks,

MC