It's the Cadillac of roasters -- or maybe the Mercedes-Benz, considering its origin. The German coffee roaster Probat isn't a household name, but it's synonymous in coffee circles with high quality coffee roasting. Some of the best artisan roasters in St. Louis -- Shaw's Coffee Ltd., Northwest Coffee Roasting Company and, most recently, Kaldi's Coffee Roasting Company (more on that later) -- have been using Probat machines for years.When I visited Northwest earlier this summer, owner Rick Milto
