[punctured]

I was originally going to put fins on it and of course space it out. I kinda figured it would be pointless to have the tube touching itself (inner rings touching outer rings).

Right after I posted the picture, I thought that maybe the exit point should be gradually lowered... each ring slightly lower than the next. The fins would be soldered/attached to the inside of the rings pointing upward just a little bit. The fan would somehow be attached above the center of the entire spiral (sucking ( :shrug: ) air out).