Upgrading the Q of resources

[Minty]

For the hard limit, I meant more towards it being dependent on the source Q. Like, Q30 can only be turned into, say, Q70, and then those resources are flagged or something as having been converted, stopping them from being upgraded again.

Just seems like it would inflate all materials to effectively be worth 70 higher, or whatever scaling system you go with. There's no way to balance this system in any way with resources being infinite. Going out and finding those rare Q255 resources is the only real progression in the game past colonizing your first system or two.