[Lancashire Fusilier]

I am a bit of a Johnny come lately here but was wondering if the issue of the difference between the two systems could be as simple as whether the function was set to latching or momentary control in this case F4? I imagine that that may make a difference to the effectiveness of the smoke unit. Very interested as I plan to install smokers in my locos too. (With Richard's assistance only he doesn't know that yet - just softening him up with orders for tools and LEDs last week but the real issue is yet to come hahaha)