Glenn,

Avoid bundling the spark plug cable as tightly as you have. Those tight turns could open up an air space between the center wire and the insulator. This is not advisable for high voltages as it may cause arcing. It's called critical altitude or something like that.

You last image shows wires leading forward. If these wires are part of the RC system you should redress them to keep them seperated from the ignition system.

Dan.