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Mine arrived today; man, this is some nice gear. As soon as you hold one of these in your hands you're left without doubt that it was money well spent. The stock focuser I took off my SW Black Diamond ED80 seems like a joke in comparison.
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It's definitely a sturdy piece of kit. The stock focuser could have been so much better if SW made the effort to machine it properly at the factory but if you want motorized focus, the Moonlite or an equivalent is the only way to go. I looked at alternatives, but one particular brand had the drive belt for the focus motor mounted externally and that didn't appeal to me.
I received the controller for the stepper motor in the post the other day and it's great, extremely fine-grain... and I can finally achieve focus with a barlow connected, which was a real hassle with the old focuser.
The only issue I've had with it so far is that it needed to be collimated. You might want to check this, Lee. It wasn't the focuser at fault, since they center them before they ship them out, but the SW tube not fitting flush against the 3-bolt Synta flange Moonlite supplied with it. There are 3 hex screws to adjust and although it took a while I eventually managed to get it dead center -- according to the collimation laser anyway.