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Just as an aside to the above. I also own an EZ laser collimator which was an early version of the Glatter tblug and a set of Tectron tools, which are a very early version of the Catseye system. I have also used a whole raft of other laser devices, including holographic lasers. The Tectron tools consist of an old fashioned mechanical "sight tube". An old fashioned "Cheshire", and a mechanical "autocollimator".
I am yet to find any laser device that can improve on the collimation obtained with the Tectron autocollimator. Whilst I don't own the Catseye system, I have no doubt it does just as well as the Tectron tools.
Cheers
John B
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