i was on a plane today. there was a kid on the flight who had a board, and jon reyes put his scoot in the overhead bins. so yeah, as long as it fits in the overhead you can take it on the plane.
V2i's are soooooooooooo much better than AOS decks, hands down. they're so much stronger, there's way more footspace, and they just feel better overall. i would seriously consider buying a district over an envy if i were you.
it doesnt need rounded edges, you just need to not ride a kids' deck ;)
and the spacers arent that hard to get in, just use a flathead screwdriver to push em in.