[Charles Freeborn]

Many thanks. On their server - duh. How else would it know what to tell my site to do.... My service does all editing / theme changes, etc on their end via a "Dashboard". It has preview capabilities and easily switches back to prior version, so the risk is minimized. It also saves theme information, so when switching back to the parent theme all the settings are there. It's also possible to back up to my machine and re-load if it all goes sideways... which I've done...