Workflow Quixel to Keyshot

[SpaceMonkey]

Hi All
I am trying to figure out how to get PBR's from Quixel and mixer into Keyshot.

I have trawled the net and am surprised not to find anything concrete on the subject. It has come up once before in this forum however the question was not fully answered.  Reference was made to poliigon to keyshot tutorial by Esben Oxhom but that is quite different.  I watched this tutorial and came up with the following.

So I have tried several permutations and the best I can get is :
Albedo to Diffuse
Specular inverted colour to Specular
Roughness inverted colour  to Roughness
Normal to Bump 
As you can see from the attachments the Specularity and the roughness are awful. Please could someone advise?
Thank you