A preamp is basically a preamp unless it is made my Mark LEvinson and uses their special connectors 
I would have no problem testing the C2 and doing a video on it. You can reach out to me via my email: VintageAudioReview@proton.me
and I could send you the spreadsheet as it stands now and discuss about testing your C2 if you want. I have an integrated amp that I will be testing and it would be useful for the preamp only template, but I am always looking for new video subjects… Scott
I sent you an email.