Trying to figure out if I can put a 3 or 4 way box for 3 or 4 light switches in a block wall. I'm refitting a house with copper cable versus aluminum in Florida. It means a huge reduction in insurance pricing if changed, so much so ($600+ a year) that it will pay for itself in 2-3 years, so staying with Al cable is not up for debate, note cable has alumiconn blocks but this does not work for insurance company. House is block construction with bats on wall, all drywall is down. All existing boxes are 2 gang but I'd like to make 3 of them 3 or 4 gang boxes. To do this I'd need to cut a bigger hole in the block and that would mean cutting the web (I think that's what it's called) in the center of the block. So my question is can I do that or would it effect the integrity of the block or against code? For the record I can't surface mount, I can't add conduit, and the wall is in place so I can't rebuild and position any of this within the wall. Any guidance would be greatly appreciated.