I understand you need to take caution when drilling into the roasted woods. What kind of "caution" are we talking about?

[ThisIsHuhWow404]

My current build on order is a roasted alder body that I need to direct mount the pickups in. My next build I’m specing out is going to have a roasted maple neck I need to install string trees on, and possibly a roasted swamp ash body I’ll need to drill the pickguard into.

I know the roasted maple you need to be extra super careful with when drilling the pilot holes and driving the screws, but I’m not sure what "being extra super careful" actually means. What other precautions do I need to take?

Does this also apply to roasted alder and roasted swamp ash or is there just something about the lack of moisture in roasted maple specifically that makes it more prone to splitting?