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PTFE cutter for bq heatcore unibody

A cutting guide to cut PTFE replacement tubes for the bq heatcore unibody to length. Print one with the small hole facing down.
This gives a smooth surface to slide a knife along resulting in clean straight cuts.
PTFE tube is commonly used for bowden setups and can be bought by the meter. Buy some, push it into this little piece and cut off the next replacement for your hotend.

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