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Unless you want to fit your own fan and/or focuser go the Deluxe and ask for upgrade to the 10:1 Crayford over the standard one (if not already included). Focuser makes a lot of difference. Crayford gives you much better control over focus without disturbing the view (bumping scope causing vibrations or image "shift"), and the 10:1 Crayford gives you even better, finer control over focus. 10:1 refers to gearing and means you turn the knob 1 turn the shaft only turns 1/10th turn. Very useful at high powers.
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