roundtip from Windows Resolve back to FCP7 - codec to use

Have spent this afternoon trying to figure out a codec for outputting fcp roundtrip

We are working on a PC resolve

From what I have seen it isnt possible to get a reliable Codec out from this resolve PC to a mac with FCP 7 and a kona card
Have tried
Uncompressed YUV 422 8bit
Uncompressed YUV 422 10bit
Uncompressed RGB 8bit

Have tried with colour bars (ungraded) and I am outputting signal from FCP to tektronics scopes where I am seeing a slight shift in chroma but not the Luma
As I have also got a red render bar I am thinking the codec outputting from the PC resolve isnt optimised for FCP e.g. its reading as Apple none (for the YUV outputs) or none (for RGB outputs)

Is there a specific solution I should be using e.g. a good codec that isnt cineform


would prefer replies from people that have experience on windows version of resolve as this is probably a quicktime issue on windows or a codec issue from resolve on windows

needing to find a solution as have big job on next week

thanks
ben