Why can't a 'dumb' hub be appended as well? I have them at my new apt complex now, not the 'smart' ones, and they seem to work alright. It's right next to the mailboxes for the complex. Again, it's only USPS that uses the 'dumb' hub, all the other companies just drop things off at the door. It's not a big deal, at least for the area I live in.