Just an update
I ordered this model a few weeks ago, and just got around to putting it in the rack. I drilled 2 holes in the back and one on each side. Created four little jumper cables and bought antenna mounts to go through the holes. So the antenna's are on the outside of the rack. I placed the receiver in the garage, walked outside and to the far end of the house (about 100ft) away and successfully transmitted with no drops (this includes going through the numerous interior walls in the house and 2 brick walls. I tested with the headset / body pack combination and the handheld. With no drops.