"Denis G." wrote in message
...
Probably this answer is more in the category of "misc. ramblings", but
could you use cooling from a stream of gas (CO2 or liquid N2) to cool
the plastic. Maybe you could get it to behave more "crystaline".
Alternatively, maybe you could add the same sort of cooling with
passages in the drill guide fixture.
Not sure about the economics of all this and you might make other
problems with condensing water on the drill guide fixture, etc., but
the plastic might behave better when cold.

Nice out-of-box thinking!