Planning on maybe 3D-printing them, but I’m having trouble creating individual pieces because I am using the free 2017 edition. Intersect is a pain, so I stopped bothering with that https://vlc.onl.
Why did you put SketchUp Pro in your profile, then? Please correct your profile.
Why is Interect a pain? If you share an example SketchUp model with us we can certainly help you.
If you are making solid groups or components you could use the Bool Tools 2 extension to help you create the parts.