Frank -

Here is a box I designed in MoI and printed in PLA in 2018. Scroll down to see the brass inserts.

http://moi3d.com/forum/index.php?webtag=MOI&msg=8944.1

They work great in PLA and are very strong once you have the hole size calibrated for your printer. I printed a test piece with holes in various sizes near the nominal size to try them out. They take 3 seconds to set using a pointed tip soldering iron. I don't notice any smell.

Ed Ferguson