And do we still use sound bombs or whatever new name might be. Thinking about one in garage which leads to house.  

Just generally,. You want shocks more central, where contacts are more suited to the edges of the frames.

Not saying there aren't places you can fit them just IMO separate units provide redundancy, make replacements easier and can be positioned more ideally for most scenarios.

As for sound bombs I never have fitted or would never recommend them, horrible things. I said in your other post that I recommended replacing the supplied speaker for something like a CQR Alto.

 

Ok noted. Cheers