I have 2 all carbon sailplanes, both have the Spectrum carbon receiver kits. After installing them I tested them by having my brother hold the sailplanes in my yard with the electric motors live. I then drove down the dirt road through the forest 1/2 mile to the mailbox at the nearest paved road. I could not see my property after driving 200 feet. He rotated the planes through every axis with the motor on and off and there were no fades, frame losses or holds. I have a Spectrum data logger that records these. I always do the first 10 or so flights with the logger onboard to check that the radio is working as it should. The largest sailplane (3.3 meters span) has one receiver mounted in the top of the vertical fin (36 inch extension) with its antenna out the top. I use retract tubing as an antenna reinforcement- it helps to prevent the fatigue that breaks the wire inside the little cables. This is the worst with gas motor vibration-not so much with sailplanes. You must get the antennas outside the carbon for best reception. There should always be an antenna in sight of the transmitter in every attitude. My giant scale warbirds have a lot of sheet aluminum finish on them so I have the main receiver mounted on the radio rack behind the pilot. The 3 satellites are positioned in various locations for and aft, top and bottom. Some planes have an open carbon-Kevlar weave inside of a fiberglass shell, I think these planes are not as critical but at certain attitudes there could be considerable signal attenuation and loss of range. After you do your installation range test it further than the max range you would fly it.