I was really hoping that this would allow me to pull ammo from my hub to fill turrets. I find it kind of dumb that I have to put an ammo belt loop on my space platform and I have been looking for a mod which would allow me to avoid that. Any chance you could add this feature?

Hello adalast. I understand what you are asking for. But i will not add that to this mod.
This mod is for making it easier to transfer items you use to build on the platform, into the hub.

You could consider some of the "Linked Chests" mods, those could do that for you.

Would you consider adding this as an option in settings? (e.g. bidirectional link with hub? and allowing of any item to be moved?)

No. Use another mod for it.