Good comments all around.

- Crimps - multi-action crimpers are better as they apply more
pressure. This goes for lugs as well as coax connectors.
- Solder - Is to be avoided in liu of crimp connectors. However,
sometimes you just can't avoid it.
- Lugs - Always use ring lugs, never spade lugs.
- Wire - Tefzel is the only choice. Why? As mentioned above,
abrasion resistant, fully tinned (so even if abraded there will be no
wire "hairs" to cause shorts), and (most importantly) doesn't give off
dangerous gasses when burning. Tefzel may seem expensive when looking
at $0.20/foot but if you go through 100 feet in a glider I would be
very much surprised. That's $20. Chicken feed.
- Gauges of wire - guidelines (larger is better)
12 to 14 gauge - Main power lead from battery to distribution block
16 to 18 gauge - Power lead from distribution block to individual
devices
18 to 20 gauge - Speaker wiring
20 to 26 gauge - Control wires such as push-to-talk, air brake
switch, etc
- Get you work inspected!



Good luck.