GT2 belt tensioner

This is a __tensioner__ for a __GT2__ belt with fixation bolts for the belt.

Possible belt dimensions
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* Width: 6mm
* Pitch: 2mm

What you additionally need:
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* 4x M2x8 allen bolt and nut
* 1x M4x60 countersunk bolt and nut (shorter bolt will work also)

Printing recommendation:
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* Scale it down to 10%.
* Print with the M4 bolt side down.

Finishing instructions:
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