Here was Jim's response:

You are correct to observe this blend does vary slightly over time, and

from batch-to-batch. There are four reasons you observe differences:

same farm will vary slightly from crop year to crop year, and even

within a crop year depending on drying conditions.

2. We are a small producer, and we don't necessarily stock the same

inputs over the entire year. Because forward buying (buying enough for a

whole year at the time of harvest) requires significant working capital,

we make several purchases over the course of a year. It frequently

happens that when we are ready to reorder, the coffee we've previously

purchased is no longer available, so we try to buy close substitutes.

batch. Between batches there will inevitably be some variation.
4. The oil level on the bean will vary not only with roast level,

but with how long the coffee has been roasted. A batch that is 10days

post-roast will look different than one 2 days post-roast.

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