Thanks guys. I found some reference material over on 1911.org that looks pretty helpful. The extractor is such that even with the firing pin retainer installed, the extractor can be clocked out of vertical; it's a couple degrees worth of error which I think is enough. The extractor is press-fit into the slide, so it has to be aligned prior to full installation.
I also performed a tension test as prescribed after getting the angle right. There were some problems there as well. The grind on the extractor claw looked good to me... So I'm hoping that it was just a matter of angle and tension.
Next order of business will be ordering a couple of Chip McCormick mags.. Like I said, this thing seems to have multiple issues. It may be a while, but I'll be sure to follow up.
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