Thanks for the good information! I have been mixing my fuel in 4 liter containers (meteric is so much easier to work with). I have been using 2.5 % nitro in my fuel. The "prope" I was getting from Klotz seems to make the engines transition better from low to high RPM. I don't have any data to quantify this but it's just my impression.

I'm going to give acetone a try.

Thank You again,

Pete