Thanks Alan, I'm pretty sure the air intake openings are different in each engine because the two that I did had different openings. So what I did was just go slightly larger and be careful not to hit the race ways in the circuit board, you can see the race ways they are slightly raised so just go big enough not to hit them. I just used a drill bit that was one size larger then the opening. As for the covering on the resistor just cut it off and clean the resistor and don't put anything thing back. Just replace the old batting with new. I buy all of my parts from BOXCAR BILL. And if you want evening better performance also put in a new resistor.
P.S. THAT WAS A SHORT VIDEO, THE LONGER I RAN THE ENGINE THE BETTER THE SMOKE GOT. IT SMOKED OUT THE WHOLE TRAIN ROOM.
Thanks to all, Alex
