ORIGINAL: Tired Old Man
It's your plane and your money, but as Pe noted, it's not just your risk. Bear that in mind if and when something happens. Your only arguement is that these devices shave a couple ounces of weight. That's a very poor reason to place everything and everyone at risk.
Nope...Wrong on that one. Safety is actually enhanced, on the ground especially. I've seen guys put their hands through props trying to get to a switch.
The overall risk is probably no worse or better though. An extra bat and switch have the same number of connections as the IBEC adds. Can the IBEC die? Sure...so can the battery or switch. The result is no different, one compared to the other...engine dies. One small difference, the Tech Aero IBEC actually tells you when it's dead or not armed