Help with Drilling Acrylic Sump

[BC Mosaic]

Because it is brittle and so it tends to spider-web and at times even chip. Maybe it was just me and quite possibly just the wrong blade! LOL! However there is constant contact with a hole saw's teeth and so it scrapes/peels away, like a planer; less stress on the acrylic sheet. Just my 2 cents and experience.
I guess, upon reflection, I'm not that fond of hand held jig saws.