No worries at all, Cat. I'm sure many of us here can geek-out over something non-bass-related. I know I have gone off on a couple of wild tangents that have even less to do with the original topic than yours. And as far as my first-ever set of Roto's go, I'm pretty sure it was just a weird fluke and not indicative of a systemic problem.
First off, great choice! I did the same for my
"Projekt Blue" build and I love it to pieces!

I sourced mine by keeping an eye on Guitar Center's used database. When a decently-priced used Aerodyne popped up, I pounced on it, harvested the neck and sold the body through the TB Classifieds.
(To be more accurate, I got two. The first one's neck was so dinged up along the back that I deemed it unusable for harvesting. Sanding it down would've probably gone all the way to the wood, so I just returned it for a refund. The second one I sourced was the keeper.)
One thing that might come up, like it did for me. While the neck fit into the pocket of the Mighty Mite body I was pairing it with, the screw holes of the neck weren't lining up 100%. Technically speaking, it like a 97% match. I could see the holes almost line up, but it would've been off by enough to not be a proper fit. But before I went and did a "Fill & Drill" on the neck's preexisting holes, I tried something my local GC guitar tech suggested…
- Place the neck into the pocket. (I know…duh!
)
- String up all four strings, adding in only enough tension to keep them from flopping around.
- Turn the instrument face-down.
- Start adding in more and more tension until you have to press down on the body/neck area to keep them together.
- Check to see if the holes line up. If they do, move the neck plate into place and bolt away.
This trick was primarily meant to make sure a neck was nice and straight if the heel/pocket junction isn't snug enough or has a little too much play inside. The idea to use it as such was more of a
"Why the hell not?!" brainstorm. I figured if it didn't work, then oh well…time to find some dowels and wood glue. But in this case, it worked like gangbusters!
twinjet: If you do find a useable Aerodyne neck, please let me know if you had a similar experience or if it just drops right in. If it's the latter, then it's possible that it was a tiny variance on the part of Mighty Mite.