Acetal (delrin) warpage during machining?

Looks for some insight from somebody who works with does a lot of work with acetal.

I'm working on a part that is ~2'x2' that is 3/4" thick. Its going to have grooves in one side, some through holes and some lightening features on it.

I have never been concerned with Acetal warping in the past. Should I be concerned about stabilty in the design? Or am I going to see the part move around as it is machined?

Thanks,

Tim