From what I have read, this can be a fairly technical test of malt properties. I believe the mash program is to hold at 45*C for half an hour, ramp to 75*C over 25 minutes and hold for 60 minutes. You can do it with finely ground malt (flour) and coarse malt.
Maybe if you posted this in the Brew Science section, one of our more technical members could be of more help.
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