At Madre Chocolate
, we've been trying to figure out how to easily temper largish (5-10 lbs) batches of chocolate in an existing appliance that we already have like a KitchenAid mixer, Santha, or Cocoatown grinder/conch so that we don't need to buy another machine and take up valuable counter space for tempering.
We've had pretty good luck with some minor mods to a spare Santha we have to get good tempering results, and an electronics wizard friend of ours has offered to design and build a temperature controller with adjustable tempering curves programmed in that would control a heating element (heat gun or hair dryer) and a cooling element (fan) plugged into it based on a temperature probed affixed to the axle of the grinder. We offered to see how much interest there is here on TLC forums in a kit for $100-200 for just such a device. This would be a just a controller with a temp probe and you would provide the grinder/mixer and heating and cooling devices. The controller would give alarms at times for adding seed and when the chocolate is tempered.
If you would be interested in something like this to make tempering larger batches of chocolate with less counter space, please let us know by replying to this post what features you would want in such a device.