I don't weld any polygons. I work with the original obj. Here are my import settings.

And here are my export settings.

The scales are crossed out because you don't need to change the scale. I saved that because I prefer to work with a larger object and this saves me the hassle of remembering to shrink it when I export.

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Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
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I use Poser 13 and win 10