Glasses have weird lines in CAS/game {Resolved!}

Hello! I'm still very new at meshing. Tried to create some new sunglasses by modifying a basegame mesh. They look great in S4S but have weird, dark, lines on either side in game/CAS. I'm 99% sure this is a mesh problem + my fault, but I'm not sure how to fix it. In the course of creating, I've used edge split and removed doubles.

Any insights from anyone would be appreciated! I'm trying to get better at meshing and to create higher quality CC in general. The feedback I get from this community means a lot to me.

Thanks.