Looks great. Best way to tighten the belts is to loosen the screws on the steppers and lift them to the top of the slots. Pull the belt loop into the rod carriers as tight as you can get it and then screw a 10mm M3 SHCS into the 'loop' the belts will be fairly tight at this point. Push down on each stepper to fully tighten then tighten up the stepper mount screws. You will be able to 'twang' them now!
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