I just did my second conversion on the 293 4-6-2 NYNH&H with the 1/2 speed can motor from Port Llines Hobby. My first was a full speed can on a 300 4-4-2 Atlantic. Both conversions I used the 400 Dallee reverse units. I can tell you comparing the full speed to the half speed can motors. You get a lot more smoke with the half speed can motor, because at half speed your putting out just as much smoke as you would be going at full speed. But I might get more smoke because I'm going with the Dallee reverse unit and followed their directions on wiring the smoke and light directly back to the tender not to the E-Unit or motor.
I have my lay out in the garage. The smoke was so thick I had to open the garage door and turn on the big floor fan. But you can do that in Arizona this time of year....
The problem was school just let out and you can hear the traffic going by..... so much for realistic sound!
My wife came out it the garage and ask what I was smoking? Just a little cho-choo!