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Fitting dovetail to tube rings


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Today I made an attempt at ridding myself from cone error following Astronomy Shed's youtube video. When it came to loosening the bolts that secure the dovetail to the tube rings (its a Skywatcher dovetail for rings for a 8inch reflector) the bolts were that tightly fitted they were almost welded tight!! 

After much effort and  rounding the bolts requiring replacements, I took the whole dovetail assembly apart.

So now, once I've replaced the bolts I need to fit them back to the rings.

Does anyone know a method of doing this that reduces cone error from the beginning, I'm assuming that if I tighten the bolts and just screw the adjustment alan bolts until they are touching the dovetail, there should be zero cone error....am I right??

Edited by Jiggy 67
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