I did provide the link above in my initial post. However, Waveact did find the reason Boggles didn't work is due to his lack of eyebrows, and he even provided a temporary patch that does allow the character to be imported. The patch gives eyebrows, but because they don't stick to the head properly I'd suggest that when they come in like this the materials are also then set to 0% opacity if it's not possible to delete them afterwards internally.
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