I just got done trying out the copper tub wrapped around the header to preheat the oil. I did not yet tap my header I just wanted to see what difference the copper made compared to not using it.

When I tried it it made a huge difference in the thickness of the smoke. It was very thick starting from muffler and back. Before it was puffy and in patches and more noticeable behind the plane. Now It is very obvious it has smoke. I had a nice thick trail of smoke coming out now. The only thing is my little home made air tank sprang a leak and I would immediately loose pressure and the smoke would stop. The air tank idea did work but I need a better way to hold those fittings in the can. Also I haven't been to hobby shop yet to grab those high pressure lines. I had problems with my lines ballooning and popping off.