Don, if you're going to top coat with the oil based "poly", in most cases, the BLO or BLO mixture is going to be redundant and an extra step that's not going to materially change the look. Do a side by side comparison test and wait about a month. I doubt you'll see any difference between the two, other than the extra work of applying the oil or oil mixture as a first step. For those of us who use waterborne top coats, the Oil, wax-free shellac and then topcoat method really is necessary for the "oil loo" and to warm up the color because most waterborne products are clear/cold looking. Oil based products, already have "the look" inherent.
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The most expensive tool is the one you buy "cheaply" and often...