Airtech, I used neoprene to the muffler. It has been on there thru 2 flying seasons, and about 300 flights, with no noticeable damage. The Sky Writer flow is progammed thru the radio. Makes it easy to adjust. This is the only smoke system I have experience with but I dont think I would try any other at this time. My Edge has a 16 ounce smoke tank in it. I have flown a 15 minute flight, with smoke on during manuevers only. There was still about 2 ounces of fluid left. I have never tried just turning it on, in flight, to see how long 16 ounces really last.