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The given in the manual back focal length from the backplate is 115mm.
I just measured all the bits with a digital caliper to estimate the total length and I got 113.2 mm. This is with the CFW flush with the OS supplied part on the Atlas focuser.
It all looks very promising.
Just got word that my PMX mount is in Sydney and after it tours the Opera house it may come down to Melbourne to do some work.
Bert
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