Fingers crossed, it looks like I've been able to uninstall them all fairly cleanly. I do agree with all the other comments on here about a rebuild, that will happen this year. In the meantime, I've cleared a lot of crud from this server and it looks / feels a better installation already. Oddly, I wasn't expecting any performance improvements - all the SQL services have been off for a while - it does feel like it is running better for the uninstalls and reboots
Thanks for the help and advice ev