u/thyman3

My house is from the early 1900's and has mostly plaster+lath walls. I'd like to do some runs of ethernet cable between floors of the house, but every approach I take seems to end up hitting a hard stop inside the wall. Dropping wire between studs from the attic? Hard stop about 5 feet down. Dropping wire through a hole in the wall on the second floor, trying to reach the first floor? Theres a horizontal barrier of (what looks like) right above where the floor joists should be (see pic looking down into the wall--there's existing wire that dives straight into a pile of rocks).

How in the world do I actually get cables through this mess without destroying the house?

We have this beautiful cabinet that we would like to use for liquor bottles (see pics). It came with glass shelves that I'm almost certain aren't tempered (no marks, and there's a chip out of one of the corners), so they probably won't support enough weight as is. Unfortunately, they're juuuust shy of 36 inches across (35 3/4, see pic), and pre-cut sheets only come in multiples of 12 inches, so we would need custom (i.e. expensive) tempered glass made.

I have two alternative ideas that I'd like advice on. The first is to reinforce the shelves with wood braces that span the width of the cabinet, but still allow light to shine through the glass. The other is to cut 1/8 inch notches in the inner walls of the cabinet to allow off-the rack 36 inch tempered glass shelves to fit.

Would either of these work, or should we just bite the bullet and spend 150+ on custom glass?