Building using ressources every turn

That doesn't sound like a bad idea but I believe this won't be necessary. 

I for once use the older, weaker Ressources for my weakest ships. That way I safe Ressources for bigger ships. And if nothing helps I can just sell the Tier 1 ressources and buy Tier 3 Ressources.

The "Ressource Transformer" or however you want to call it could be a good "1 turn" Building like the "Chain Gang" ability, which you have to queue every now and then.

But just in case this Idea grows I will follow it. I don't know how this turns out to be.

Thanks for the comment ! You're right in saying that it might not be very important ane there sure are many things to do first. Yet I thought "why not" :)

I'd prefer it to be done automacally though. A big problem of the end of the game is to my mind the stockpiling of ressources and the fact that you have to sell a lot of things during each turn. This and my idea *A few marketplace improvement" could simplify this !