Hi, My partner and I are renovating a 1970's home and aren't sure what to do about the hole in the wall that will be left when we remove the old air conditioner. We will be sealing the interior wall to make room for overhead kitchen cupboards but don't want to do the standard thing of re-bricking the hole outside as our bricks will be hard to match perfectly. I've tried to look online for ideas of what we can do with this outside wall cavity but haven't been able to find anything. So far we're thinking of maybe cementing a few glass bricks in there to fill the void but any and all ideas are very, very welcome. Thanks in advance for your help!