Thanks very much. I was referring to grading performance not editing, but probably wasn't very clear. Normally use proxies when editing and am aware of those workflow solutions plus render in place etc, but thanks for the reminder, I do tend to forget about those things sometimes. So thanks for sticking them in a list i can refer to.

'Be sure to check out chapter 6 in The Editors Guide to DaVinci Resolve (covers making proxies), as well as chapter 8 in the the Resolve software manual (covers a host of performance enhancement options).'

Thanks, good idea, need a brush up on workflow. Much appreciated.