[RC-Monster Mike]

The 7018 would actually be better to use with higher voltage and a slow motor. If you use a lehner basic 2400xl or 2800xl, the 7018 will work quite well. I would use a fan on it for sure, but it is a pretty tough little controller if used within its limits. The 9920 is a better choice, though. I wouldn't get too aggressive with the 7xl and the 7018 controller. It will run it, but keep the gearing conservative.