First of all, thanks for this mod, I have enjoyed using it greatly.
I think I have discovered a small conflict between this mod and the NewGame+ mod. NewGame+ allows a player to restart on a new planet bringing their inventory and technologies (Imagine the rocket home failed and you repeat). I did this once a while back and it worked - new whistlestop factories were spawned.
Now whenever I click the new game plus restart button I end up with no whistlestops on the map. I've tried removing all mods except new game+ and WSF as well as versions all the way back to .4. Older versions tend to have a problem on control.lua:44 about pairs not found and crash on restart. Newer versions (.1/.1.1) tend to just not spawn any WSF within 3000 range of player start (maybe more - didn't explore more).
Maybe it has something to do with the way WSF locations are tracked and not being reset when nauvis gets restart via NGP.
Thanks for the mod, I'd love it if you can fix this.