RE: throttle servo location
No Manuel? With a Hanger 9 Imight expect a Chen or a Hsu instead of a Manuel, or even a <span class="family-name">Júlio</span>. ;-)
Even with 2.4GHz Iwould not tempt electric induction interference from the ignition module or spark being picked up by the servo rotor windings and being introduced into the receiver circuitry. It isn't a broadcast at that point - it's direct induction. Frequency doesn't matter. Keep throttle and choke servos at east 10" from the engine or ignition module on gassers.