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On backlash it makes no difference to how well the mount gets adjusted, the Losmandy mounts were designed with some slack in the system. It is just slack that needs to be taken up before anything happens, sort of like a 2-stage trigger. Nothing happens in the slack space or backlash just like a 2-stage trigger.? But just like a 2-stage trigger once the slack is taken up mount movement begins or the gun goes bang.?
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A good practice is to try to approach the ideal position from one direction much like an experienced SCT user will always focus by pushing the mirror up hill.? Once the desired position is achieved with adequate preload the mount won't move before the locks are snugged down.? This is the best practice with any mount.?
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Chip Louie Chief Daydreamer Imagination Hardware?
Astrospheric Forecast - South Pasadena, CA?
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Chip Louie