I did think last night that it would be fun to remove the Torture Droid and replace it with a couple of smaller ones to mirror Darth Maul's probes.
That way the mind probes are Sith issue instead of standard Imperial equipment (something that Vader personally uses with the Force to reach into the minds of his victims).
The needle looks too here and now and it must be a bugger for the poor thing to stick it's patient.