Open it is, I'll add a piece of fiuel line to it to get it to vent outside the aircraft (probably to the down side of the plane).

Ok I'll hookit all up and lets see what happens. I guy told me last year when I bought the smoke unit to put a little bit of very corse steel wool in the muffler to help it heat the oil. He was refferring to a OS 2 stroke engine that had the big muffler. Have you ever heard of doing this, I would think it would cause performance problems with the engine.

P.S. I read part of your article and I won't call it a motor anymore, thanks.