Eric Johnson wrote:

Fantastic, thank you for this input. I'm also glad to hear that having
to rotate the tube is a normal thing.

It's very helpful (and easy) to put some kind of retaining ring (such
as an embroidery hoop) on the tube. When you loosen the tube rings it
will prevent the tube from sliding down as you rotate it and upsetting
the balance of your set up. Saves a lot of time when you set up too -
always gets the tube rings in exactly the same place on the rings.

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Martin Frey
http://www.hadastro.org.uk
N 51 01 52.2 E 0 47 21.1
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