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No luck getting collimation spot on, but one thing I found is that you can't tighten up the push-pull screws very well. For some reason they use a nylon sleeve under the pull screw which tends to compress slightly. So I made a trip to Jaycar to get some small metal sleeves to replace the nylon ones (see photo). Also a small amount of lubricant on the screws to stop them binding up.
Terry
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