> Attach the probe very well to the exterior of the inner
wall.

Interesting idea, but I fear probably harder right now than a straight
through penetration (which could be narrow diameter and a fully closed
surface - visions of the Terminator's wounded head abound).

However it would be very interesting to see how the heating interface
behaves.

This would have been a great consideration when they designed/built the
thing in the first place.
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