Bowser,
Your balance problem is a dob thing. Its common to all dobs when looking at zenith if you don't have any braking system in place like the GS springs or the tensioning system of the other brands. Nothing to worry about, just use the speaker magnet trick because if you set up your springs to stop this the whole movement will be terrible throughout the range. I don't use the springs, just the magnet counterweight system.
Cheers
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