Okay guys, got a very quick first draft guide on converting VRC models to CVR.

https://vrwiki.nexisonline.net/wiki/VRC_to_CVR

TL;DR
 Copy project
 Convert physbones back to dynamic bones (I know)
 Install CCK (CVR dev sdk)
 Run a conversion tool on your avatar (imagitama works okay which is a shame since I hate furries)
 Delete VRC components on avatar
 Upload to CVR (Tag honestly, you will not get banned for (almost) anything if it's tagged properly)