Good Friday evening,
I wanted to update this, and thank everybody who read and posted. I got my RS3 LC+ smoking again, but I did the "rob Peter pay Paul" thing by taking a smoke unit out of another LC+. It's all good, I don't run smoke on all my locos, just the RS3.
One thing that is eluding me, is the screw driver required to open a smoke unit - what size is it and where can I obtain? My electronics screwdrivers, as Klein Tools calls them, are too big for that circuit board.
Thanks again