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Hi Paul. I think you'll find that the manual is clear but we just don't quite "get it" on the first few reads in some bits.
I asked about the scope because I suspect your dob base might be a bit "sloppy". The older GSO ones were. Watch for flexing of the two side walls as the scope is elevated and lowered. Also look to see whether the tube unit is moving a bit along its altitude axis (the axis through the trunions) as you move it up and down. I found that a little mechanical work on the base to deal with both these problems assisted.
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