I’ve learned this as well. But printing parts to supplement existing toys…now that’s been great. Hot Wheels accessories is a really good example…

I have a belt with a plastic buckle/cinch thing now that i always make sure is my “flight belt” for this reason. Even for events i know will have security check points for access. I’ve only ever had to take it off ONE time in like 8-9 years and that was flying out of Dublin airport to mainland Europe last month- i had already gone through the scanner and I got flagged. Security dude said it had nothing to do with plastic vs. metal belt, just that it was a “bulky area” that something could be in……well, fair enough, i guess.