Hi Rob, As long as you keep the centre screw done up there shouldn't be any tragedies. Another good way is take one out, then replace with the new one, etc.You will have to recollimate the secondary when finished.
At first I was only going to buy the primary knobs, but after some thought, I knew that the one off time down the road when I would have to recollimate the sec, I could see me dropping the screw driver down onto the mirror
( Murphys Law ). So I bought both sets
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Originally Posted by robagar
John, is there anything to be aware of when replacing the collimation screws (like the secondary dropping off and breaking the primary when you undo them all , f'rinstance)?
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