Repotting a Cymbidium - Do I wash off all existing medium like on other other orchids

[RosieC]

Ok... so I've now got my Cymbidium media (got a Cym mix recomended by one of the nursaries here) and I think I have a suitable pot and my Cym is desperate for repotting...

so do I want to remove all existing medium like I would with other orchid repotting or is it more like the ones where you leave the old medium and just add more to fill the new pot?

Also is it completely the wrong time of year to do this? I wanted to do it in the spring but just didn't get myself organised enough. Should I go ahead now (the existing pot is struggling to fit all the new root growth from the new lead growths and I would like to give it more space) or should I wait?