How were the results compared to a traditional decoction? Any tricks to know about?
Edit: For some context, see here.
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No, but I'm fascinated. The writeup you linked to seems pretty comprehensive.
It does seem like a really nice way to get the benefits of a decoction while saving yourself the labor involved in a decoction.
You'll get DMS formation in the enclosed environment, but any that is formed should be readily boiled off as normal during the boil.
It may not 'scale' well for a normal batch size; pulling a 3rd of the mash for decoction can be 1-3 gallons by volume... that's a lot of little canning jars you'd need. Will they all fit in the pressure cooker? How much does a big enough pressure cooker cost?
Also consider cleanup. Would you rather clean one decoction pot (which is usually your boil kettle anyway), or a dozen little jars?