When I do the upgrade, I do indeed change the wick, and of course omit the sleeve on the new resistor. Finally, I drill out the intake hole to allow more airflow. I settled on the 20 ohm after doing some tests on the TMCC electronics and trying to determine what would not unduly stress the smoke triac. It's also a tradeoff to maximize the smoke output while minimizing charring of the wick.
It's important to insure the new wick does not block the airflow from the chamber, over the resistor and out the stack. The resistor should be in solid contact with the wick material, but not totally covered, which will greatly reduce the smoke output.
