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In the other thread I suggested that the first lightbridge mod should be blackening those white inner tube ends but I have changed my mind.
I reckon the first mod should be gluing a washer on the secondary holder for the collimation screws to bare against. You will be tweaking the secondary often and the holder is only soft plastic. The screws will quickly gouge holes that they will always want to slip into so a metal surface will be a lot more durable.
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