As purchased, the Santha Wet Grinder can not be run more than an hour at a time. For refining chocolate, this is a hassle. I have been doing some tests to determine why it over heated and what I could do about it. It turns out that the motor was simply not getting enough air flow. I cut a hole in the top of motor housing, and added some extra vent holes at the bottom, and now it does not over heat. So far I have run it 24 hours straight, 3 days in a row, with no problems.

Mine now looks like this.

You can see how I did the full modification Here

I think it is easy enough that anyone can do it with basic tools, but I am thinking about offering the Santha-Hack service if there is interest. Is there?

Happy chocolate refining.