Thanks Michael.

One of the fundamental problems with some of these product models I'm getting these days, is that they're not particularly well put together upstream. So when I get them, I find that there are substantial surfacing and edge issues, which are leading to the naked edges when I export the meshed .OBJ files. That, is the primary reason why I'm having issues like what I posted above. I've tried many things, including your great tip from a while back, about scaling down the problematic parts, re-joining them, then scaling back up. But unfortunately, I still have a ton of naked edges. I hope to convey some info to the designers soon, but they're in Asia, so I may wind up with limited opportunity to plead my case with them.