deep hole drilling in Plexi

Hello, all,
I have a job coming up where I need to drill really deep holes in Plexiglas.
The thing is 20 mm deep, and they want holes of 0.6mm, 0.8mm and up. I
expect a peck drilling cycle will be needed, with coolant and brushing the
chips away.
Does anybody have any suggestions on how to do this? I've done a fair bit
of machining of Plexiglas, but never anything like 33 X diameter deep.
Thanks for any hints!
Jon
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Jon Elson
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