I got it apart per the instructions in the link posted earlier from that guy in Calgary. It was not a tough job at all.
The bottom of the cylinder was not sooty.
It has a big burner in the middle with an orifice hole where a bigger brass pipe comes in under it. I blew mineral sprits through that using the brass tube to blow from. It squirted ok.
The thermocouple and the pilot flower beside it were not sooty but I did shine up the thermocouple and straightened it back from where I had bent it.
The flower was hard to see down with the angle to it, but underneath where the small brass tubing screws in, you can see "up" to the end and there is a tiny shiny metal piece with a tiny Y looking marking but no hole seen (as expected from the earlier description.
There was no obvious way to get that presumed orifice piece out but I soaked it all in mineral spirits from both sides and put the small tubing on to make a "straw" that I could blow through and I first got no squirt, just a dribble, but then it squirted! Aha!
Got it all back together, waited a few hours for the mineral spirits to dry some, and tried it out. Much better pilot flame and now you can hear it flaming like the RV guy said I should be able to.
Still no change from the pilot adjustment set screw, so I gave up on that.
The pilot will not stay on by itself unless the thermocouple is heated with the BBQ lighter flame also. Same as before there.
Anyway, with the pilot door closed, it stays lit long enough to turn it to ON and she fires right up and stays on. :) That is all with the thermostat at Medium ( or where Medium is pointing down anyway)
Still don't know if it will cycle on and off to maintain a room temperature. That will have to wait till camping in it. At least we won't freeze as it is now.
Thanks for the good info and advice everyone. Now on to the next renovation tasks DW keeps thinking up!
