RE: Servo extension wire?
Norton, I think you overestimate the proper current carrying capacity of a given size of wire, just because the wire's big enough to carry the power and not overheat doesn't mean you should be using it.
Here's a few examples.
At 4.8volts, under a 300ma load (sounds about what a servo draws under worst case scenario)
AWG---Volts at load---Ma's wasted heating the wire
28---4.742---84
24---4.779---30
20---4.791---12
18---4.794---8
Keep in mind, power dissipated by the wire itself (considering it's length) can be harmonically magnified at the servo refresh rate of about 50hz due to the very low capacitance of a wire of that length you can be talking relativly large amounts of harmonic interaction across the length of the wire. Since it happens to be around the edge of the length of a 1/4 wavelength whip on the 72mhz spectrum that 'little bit' of resistance can cause some relativly strong feedback to form, both as distortions in the servo signal and possible short (virtually non detectable) spikes of EMF on the 72mhz spectrum. Every single last nano ohm counts to reducing possibilities of inductive reactance.