This resolved itself ultimately with updates from the SID channel... I do not know precisely what package caused this and/or what fixed it, and that frustrates the hell out of me
Things are back as original, no need for Guest Additions and everything is building as they should
For anyone who needs to remove Guest Additions on a VSIDO installation do this:
To uninstall the Guest Additions do this
cd /opt/<VirtualBoxAdditions-x.x.xx>/
sudo ./uninstall.sh