I'm trying to sort out whether an installer actually could upgrade my mother-in-law's installation for HD. The photo shows the current situation with the 18" dish - mounted to a wood beam attached under the eave. (The antenna mounted to the front is for long-distance Wi-Fi): This has worked well for over a decade for SD, but could an HD antenna be mounted here in place of it? If not, does anyone have ideas as to what to do, given the underside of the eave is thin aluminum and the construction of the rest of the house is mortared stacked flagstone (none of which have a flat front)? I'm trying to determine whether I should even call and ask for an HD install. To recap what I've asked in a few other threads, my MIL wants to add a third receiver, and I thought this might make a good opportunity to upgrade to HD given all of the TVs are HD-capable already. But it's starting to seem like just adding a multiswitch and buying another SD box might be the only rational thing to do without creating all sorts of hassles.