Here is my Sullivan in my Pitts M12 with a DLE55RA.
This the bottom view underneath where the bottom wing goes. The 2S Lipo on the right for power. A 20 oz. tank is on left, just below fuel tank.
I split my outgoing line with a "T" and go into each side of the muffler. The input nipples on each side of the muffler are just pressure fittings squeezed partially closed to help spray the oil. It works well.
Mine is setup with a simple on/off. The fuel flow is turned way down, by end points, to just above barely working. This keeps from using too much oil and leaving a mess on the plane.
Sorry I don't have any video. This setup, very simple, works well for me. A good smoke system for me is one that allows me to easily make my airplane disappear in it. Lol.
Also, I have never felt there was a need for preheating smoke oil in gas engines.