G_F presents a point that should be at the forefront of everyone's mind when testing:
"What are the goals?"
BillA, webmedic, and my goals are all somewhat different and demand varying precision (and expense accounts).
Regarding simply increasing sample size to produce the needed accuracy:
Not likely. Without good measurements then no number of replicates will help. As mentioned you can probably separate "crappy" from "good" as long as you are only making 2 piles but no better.
The most useful thing you could do with a typical roundup would be to take a lot of pictures and detail the mounting/remounting of the block. These blocks for the most part do perform pretty similarly, so ease of use and bang for buck are valid things to use in comparison.
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