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You're correct - I only have one screw holding the fan on at this point, but I think I'm going to replace that fang altogether with a more efficient design. The belts need to be attached to the rear, like in the original X design that this was remixed from - instead of the mounting plate used in the original design, I simply used a bolt & screw to secure it. This will also be addressed in V2... and I'd like to incorporate some sort of belt tensioner as well.