I will address question 1. Antenna routing is normally done for convenience, and at times can be problematic.

Consider that 'signal' wires should be routed in a different route than 'power' wires. But considering servo's have all three in parallel to each other, well, that sort of blows holes in that theory.. except the antenna. Consider the antenna as a separate wire altogether and try to keep it away from other components. Non necessarily because of inteference, but to get the best efficiency out of the antenna. It should be routed in one length, with as few bends as possible, and routed the entire length of the antenna without folding back and so on..

The antenna for 72 MHz is about 1.04 meters, or about 39 inches long. That is a quarter wavelength, by the way, for those of you that understand such techie stuff. Optimal length means that it is getting the best signal from the transmitter so the antenna should be strung out as straight as possible (note.. as possible... I know that there are times when this is not exactly possible). This will give you the best signal strength received and thus the best range and response.

I usually try to get my antennas out of the fuselage as much as possible. I've even routed it out the bottom right behind the servo tray, then run it along the bottom of the fuselage and held in place with a narrow strip of covering material that runs the length of the fuselage, keeping the antenna straight and all the way back. If the antenna is longer, then secure it in place and let it dangle. It won't hurt anything.. but NEVER cut it.

DS.