IMHO all of your "numbers" seem just fine.
Still not understanding the mechanic's logic in adding oil to the cylinder tho
Here is a suggestion from one of our guru's (Dave Neptune) that might help with the soot...
"I have been gapping my plugs at .038~040" (larger gap acts a bit like a hotter plug)
Take advantage of the EI by opening up the plug gap a bit .040"