Depending on what engine you are going to use, I found that you would have to build or get some type of heat exchange unit ( Don't know where to buy one ) for most glow engines in order for it to work.
I tried it on my Extra and my exhaust was just not hot enough for it to work no matter how I had the smoke oil flow in it, and I tried it on a O.S. .91FX Ringed. It pissed me off because no one mentioned it wouldn't work. [:@] More money waisted, Oh well.
I had my tank just behind my glow tank, and my 6v battery and electric pump below my engine mount on the fire wall.
Balance your plane ALWAYS with empty tanks!
I took all my stuff out of the Extra 260 and put it away until I buy myself a 1.20 or bigger engine. Then my exhaust should be hot enough.
Good Luck.