Did they IRON instead of steel to keep down costs, if my 3070 needed support i`d put it at the end that is not supported by screws in to the case already.

This brings back memories of PCI-bracket fans to add additional exhaust in the system.

The Goose:

Did they IRON instead of steel to keep down costs, if my 3070 needed support i`d put it at the end that is not supported by screws in to the case already.

The screws at that end might not be supporting it very much - there was a video by Jayztwocents where he showed a couple of different cooler designs, and depending on how the cooler shrouds were connected to the faceplate or not, they would sag or sit straight. A tiny plastic shim would fix the sag on several of the cards even.