I converted FPSBlyck's widowmaker model, who uses physical render, to Redshift 2.6.32! (also, I translated the object names from russian to english)
Important Note: Do not add a Subdivision Surface do the model, because it is already applied in the Redshift object tag. So, if you want to change the SubD amount, do it in the object tag under Geonetry > Maximum Subdivisions.
If you have questions, feel free to ask them here: https://twitter.com/3DWidowbutt