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Hi Theo, can you let me know how the catseye collimation set works out.
When assembling the struts make sure the clamps are well seated and tight, also the screws that you remove from the cast rings for the mirror and also the cast rings for the struts to the upper and lower tubes must be tight (within reason). Otherwise you may find that the scope may loose collimation.
Be careful if you use the altitude tension adjustment assembly, as the nylon friction pad will scratch and gouge the aluminium altitude bearing. I have been advised to replace the nylon pad with Teflon. As none of my lenses are heavy I don't use the clamp anymore.
One of the primary collimation screws is tight on mine as well but not a problem. Add a small drop of fine oil to the threads of these thumb screws and the strut lock knobs, wipe of any excess oil immediately. This helps to tighten the strut clamps without the thread binding and little force is required.
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