I have the dx3 spectrum radio (not module) and I have the roll over lock out problem in my touring car. Running a cyclone (6v 3a bec) and the original small cap, analog servo, personal transponder. Adding 800 uf cap "stutter stoper" to the reciever made it a most of the time it locks out problem instead of all the time. A rx pack, 160 mah 5 cell fixes the problem, but gets pulled down pretty quick by the spectrum, only one heat per charge. Adding a 1000 uf cap and the stutter stopper worked pretty good but yuck! 3 caps!!
I called horizon since e-mails were just getting the "we know of no problems" answer and talked to a teck who wanted to shake my rx to see if anything was loose......... scarry. They promised a 5 day turn around????
I looked inside and find a long grey wire feeding the antenna that was laying over a part of the board with an amp and some caps. the wire had a pinch or iron melt on it !! I have re routed the wire, and things seem ok but I have not rolled since, maybe this week we'l see, Using only 1 big cap now (all done deliberatly and repeatedly traction rolling after stressed arms broke in the main and expensive mail order parts!)

Wish I hadnt sold my old radio!