SMOKE PROBLEM RESOLVED:
She's smoking pretty good now.
Again, after searching OGR, I find JT's mega smoke to work best on this engine.
After a few hours of running, the smoke improved. Probably due to having to burn out the existing smoke fluid from other manufacturers before the fluid was all JT's.
Also, I find putting the switch to conv for smoke gives me the best output: still not as much as my MTH's units but at least I can see it, now, from a distance, and not have to be with 2 feet!