Possible I will , you have made your background well known .................................................. ......................................oh mine should be delivered in the next month or so.
So exhaust gas is 650 -700F at the cone of the tip and Dave your saying it cools down so much when it gets to the exit of the pipe that the Culmius smoke oil won't atomize.
Also the oil could be inhaled into the pipe a slow speeds , I still would have a rear atomizing point for the oil.
All of the new pumps can be adjusted to throttle position and decrease the amount of oil for the smoke stream.