Thanks. I took the plunge and installed the _SM version as that was on the TopSony downloads area for K810. Yes I did the custom pack (CDAxxxxxx - I can't remember the number - I am at work) and then I also did the K800 light effects. The K800 now says K810, I have TrackID and applied a few patches. Unless something goes horribly wrong I will stick to the _SM version.

Darren