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Originally Posted by davidpretorius
side / bottom and suck / blow????
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bottom & blow.
Mounted the fan in the centre of a plywood disk. The disk covers the entire back end of the scope. I drilled holes just a little bigger than the collimation & mirror locking screws, so I would not have to use spacers for it to hug the back of the scope. I love it. No more ghost images, i.e., double, triple or quadruple planet images! Only proper bad seeing!