>Did you ever consider heating the tube? IMHO if you wrap the tube with
>a resistance wire (i.e. thermocouple wire) and run some battery current
>through it it should heat the tube nicely. Of course some
>experimentation will be needed and YMMV.
Wouldn't that increase the diameter considerably? I think I'd want to keep
the drilled hole as small as possible. Also you have to watch resistance
wires pretty carefully, as they tend to get rather warm and do a little bit
more than just "heat" a plastic tube....
However, if you could get a small enough wire and keep it from getting too
hot, it seems like a pretty neat idea. Of course, down here in Houston,
where it's 93 degrees in October, who needs resistance wire? :-)
-Rick
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