Anyone notice more signal loss with using the Pi Zero vs a Pi 2 or 3? Am trying to get a couple 433 MHz moteinos to talk through a couple exterior walls from one building to another. Initial tests reveal that I get less signal loss using the Pi 2, but I haven't tested much yet between the two. I was also looking to fit a moteino inside the case that came with the pi zero, Moteino over top of the pi with a thin layer of foam in between the two. After doing that I can't get the two to communicate at all. Perhaps the pi zero is interfering with the signal when they are on top of each other and too close?