Bob, I'm with you. I would NEVER use 4.8V on a 2.4 system. I too have been using 2.4 exclusively since 2008. I have had 2 crashes because of radio failure. The first was a regulator failure. The voltage input wires fatigued and broke free from the PCB. The second one was be caused I mistakenly used a receiver that had been crashed. These are what I call self inflicted failures. My current gasser would keep some guys awake at nite. The RX batteries are 2" away from the ignition, the throttle servo is 3" away from one of the plug wires and 1.5" away from a header. I use a Tech Aero IBEC. This airplane has about 40 rock solid flights. Part of that success ( although quite early in its lifespan) is that I'm using a power expander and all servo and power leads are twisted. Twisted wires are a subject of debate however even if there is no benifit, there is no downside either. Being that I have been flying models for 36 years, I can honestly say that these days I see far fewer radio related crashes then ever before and I see far more poor installations then ever.