Deans Antenna
Windsurfer:
I have been using Deans Antenna for the last 6 years or so in applications from electric to 1/4 scale without any problems. I have used both the external "whip" and internal "singer" types. I mount the "stinger" type with a dab of silicone sealer as it remains flexible and allows the antenna to be easily removed if necessary. I also slip a length of fuel tubing over the antenna itself and anchor that with a dab of silicone sealer. You have to be careful so as not to allow the antenna to touch any metal or electrical items.
I cut my standard receiver antenna to 4 inches and attach the Deans.
A number of the local heli guys fly with Deans and have no problems either.
My experience - your mileage may vary.
DT