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The tricky operation of bonding the back plate retainer pads is done.
I had to throw into battle my Taylor Hobson micro alignment telescope that I bought years ago at a Thales auction and never used until now.
It required the making of a precision adaptor that is bolted to the back plate.
I removed the back plate and put it back a couple of times, after the epoxy had set, and the repeatability is very good. The line of sight always hits the centre of the secondary hub within 0.001" .
Last edited by Stefan Buda; 22-12-2018 at 10:39 PM.
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