Pete, Well said my friend. The only thing that I will add is that on gassers I will not use a switch that flows current. Granted at the present time I only own 1 gasser but I will always use a soft switch through some type of regulator. This is one of those times where the intended goal of the airplane can dictate the equipment selected. One, switches will only handle a certain amount of current. On a large IMAC type airplane we really don't know exactly how much so the safe thing to do is err on the safe side. Mechanical switches are prone to failure as well. Now regulators. Most would consider regulators a failure point and I can't argue that. That's why my system runs redundant regulators. More important to me is that my RX and servos see the same exact voltage all the time. That means that my first snap roll of a contest is going to have the same servo speed and power as my last snap roll of the contest. Very important for an aerobatic competition airplane. Now to get soft switches, regulators and such it was just a no brainer for me to go to a power distribution box. Are they required on every gas powered airplane? Certainly not, my point is that several methods will work, do your homework and choose what fits your need and budget best.