As part of my rekindling (going back to NetRadiant after a LONG time) I've decided to put this theory to test. Here's two void4 inside one oa_bases3, first pass, a.k.a. pre-alpha.
I'll be very busy with RL things, but I'll be back in December. Meanwhile, I have to relearn again about how to properly do maps. :/
P.S.: If anyone wants to compile it, here's the .map file. Be aware, though, I haven't made map changes to bases3 and haven't moved entities out of place, so there will be errors which must be fixed manually.