Also FYI,
I ordered a HWlabs SR1 140mm radiator for the 140mm fans radiator based testing. I went with it since it was a low density radiator that is also over width. I figured it would have very low pressure drop and have very little obstruction of the shroud edges. It also uses M4 screws which I much prefer over M3 that some of the others are using.

Anyhow, it should be on it's way..

I can probably test with the adapter first, but I wanted to have a radiator template in actual 140mm form as well.