Originally Posted By jcc
The "drilled" is in almost all cases, including yours, a big no no, slotted does have some upsides. I don't see how either improves any potential warping issues


What warps them?

Heat

Maybe the drilling and slotting does do something.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.