We finished the last piece of the cat path I posted about earlier! This one goes from the laundry room, to the stairwell, and then into the guest bedroom on the upper floor (yes, I know the carpet needs replaced in that closet). They are already using them and seem to love the new path already.
That’s awesome, but I was very confused by the first picture. I thought you ran ducts all through your house like a giant hamster cage. Very cool though!