it would not be hard , you just use a hand drill or Eletric Drill
with a very thin drill bit & drill the right Rivets out , may even be a Rivet Removal Tool. i was going to remove my bottom hd cage, but left it as it is,
after you remove the cage you can always use screws for the cage to hold it in place.
i am still waiting for a window side panel to come out for my Arc Midi Tower case to show off my cooling setup.
hope this helps.