Not surprising. Column strength is very high in such a short structure. Did you do the tests at maximum height of the stand? The taller it is the easier it will buckle. However it looks as though the pin will fail before buckling anyway.
The sideways stability to me would be more worrisome than the column load. Although this unit seems pretty nice to me. I think those that look down their nose at it are a little uninformed. Thanks for the interesting post.
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