In case you are wondering about primary spring and collimation knob upgrades, here is a picture showing stock Zuhmell parts next to a couple of alternatives.
My personal feeling is that anything that speeds up collimation and adds to the strength of primary support is worth looking at. Sorry, I don't have an example of Bob's springs. My primary collimation screws were 6mm.
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Re: New Zuhmell Owners -- Upgrade Mega List Thread
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