My go-to solution for smoke is to replace the 27 ohm resistor with a 20 ohm resistor, and also new braided wick. I also drill out the fan intake hole to 1/4", and enlarge the stack exit hole as much as possible. You should be able to get very nice smoke from that smoke unit.
I take this Stackpole CB5JB20R0 resistor and carefully crack the outside ceramic shell, out comes a perfect 20 ohm smoke resistor. I just put it in a vise and squeeze the corners in the vise until the ceramic shell breaks. Use safety glasses!
Don't be tempted to go lower than 20 ohms, that risks cooking the R4LC smoke triac.
