Gogs wrote:

Also when cutting say 40mm worktop with the Makita which has a max
depth of around 66mm I think, should the saw be adjusted in anyway or
just leave as is.

I'd agree with John & Andy except in respect of the depth adjustment.
Normal practice is to adjust the depth of cut to just over the thickness of
material, so the teeth & gullets just clear.

The theory is this gives a faster tip speed and a smoother cut.

Dave