I think a dremel is your best bet using the plastic cutting wheels. Go slow and clear the melted scrap away and you should be good. Those hoods aren't brittle they shouldn't crack.
Small hole saw or a wood boring bit for holes. Dremel for half moons. If the plastic melts a little, an exacto knife helps clean it up. Not sure if you are rewiring or trying to run pump wires through the hood so I gave you two options. Go slow.
It may not be the most technical method.. But I always end melting plastic rather than cutting it lol you can use a putty knife over the stove and just melt slots in the back or even cutout sections. I modified the hood on my old nano this way
It may not be the most technical method.. But I always end melting plastic rather than cutting it lol you can use a putty knife over the stove and just melt slots in the back or even cutout sections. I modified the hood on my old nano this way