Best tool for cutting off a plastic-flange chunk from inside an enclosure?

[Doctorandus_P]

Also, things like a dremel (like) or hot knife are not very expensive. If you go in the direction of a custom jig for this, the put in (an option) for two of those devices so you can cut both tabs at the same time.

[coppercone2]

if you make a jig put a vacuum cleaner attachment in there too