I agree with you Hankster. The shields commercially available are to small to have any positive effect. The natural airflow can’t work in those. There is not enough ‘room’ left and a shield that makes contact … you transfer heat.
That’s why a few posts back I asked if we had experts here that could make a 3D design for the Air module big enough that could be 3D printed. Think we should bring together exerts in airflow that can give clues on how the plates should be, combined with 3D cad designers to make the modelling.
The only option that is acceptable with such a big module is a stevenson screen, but those are 5 times the price of the complete station this side of the ocean. Think most people buying a WF station won’t invest that mush.