Ya'll can find the viewer needed to extract meshes over at the
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however you do need a forum account to see the links to download and then second life account to use it. Again, if you have a main account, I don't recommend using that for this but it's really up to you.
I can try to upload a video of myself exporting and converting something but that probably won't be until later. Until then, you can see a video of the viewer in action
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