SUCCESS
So this seems to finally do the trick on TC 6, 7 and 8
sudo rm -f "/usr/local/tce.installed/studio"
sync
sleep 1
sudo busybox.suid umount -d /tmp/tcloop/studio
sleep 1
sync
sudo -u snb tce-load -i studio
sleep 1
$UPDATE/com/start.sh &
Thank you so much for your help - Really appreciated!