How quickly does it cool and for what sized batch(es)? Our current cooler is about 2mins for 500g roasted beans (down to just above room temp) - not bad, but wed like to be able to cool a kilo or so at least that quickly.
Also, how does the vacuum cleaner handle it? Would it be wise to, say, remove the bag so that the hot air can more easily be passed through the v/c? We have an old v/c that might do the job, but with our intended future batch size to be 1kg+, I wouldnt want to burn it out...