Servonaut infrared ARO transmitter question

[Espeefan]

Hi guys, is anyone using the Servonaut infrared ARO transmitter and receiver kit? The instructions say the transmitter is a wide angle type, which makes sense, but I am wondering what the range of the transmitter is. If I mount it to the back of my cab, how tight can I turn a trailer before the receiver cannot pick up the signal? Alternately, Servonaut mentioned mounting the transmitter under the 5th wheel, and the receiver in a hollowed out trailer king pin. This seems the ideal set-up, except that I don't know if I will have the room to do this. With a transmitter mounted in the back cab wall, can I jack knife a trailer to 90 degrees, and still expect the receiver to pick up the signal?

Just looking for some real world advice and experience here. Thanks in advance!