Hi guys, I'm new on this subject, so please help:

1. I have my smoke hooked up to AUX7 of a 1221 but before I plug in the battery pack to the smoke pump, I realized that the pump was able to be powered up by the rx, is this OK? 

2. Wouldn't my 8.4V smoke pump battery be powering my entire rx and servos, since it's got a higher voltage than my rx at 6.6V?

3. Please provide a quick overview to inactivate AUX7 during bottom half of throttle.

4. Has anyone installed a second solenoid Y'ed off, or paralleled to the fuel for the smoke, provided that the ECU could handle it?

Thanks in advance