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.