I run 3 classes, SCT, ebuggy and Nitro truggy. I've always ran a protek life pack, and all running a R304SB RX. On the truggy I'm also using a temp sensor. I have practiced one night and raced 2 race days with all 3 vehicles and I have only honestly remembered to turn the antenna one time, but I have never noticed a glitch. I have charged the battery before each of the two race weekends. Every time I have used it so far it has been inside an indoor steel building. I ran a 15 min b main and a 30 min a main with the Truggy this past weekend also with no glitch.
I also have not done the firewire update since I seen some people who thought they had problems after the update. I hope my luck continues, it's a 3 1/2 hour drive to race for me during the winter months. It would be a long drive if I had to be trying to figure out radio problems.