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What do you do with last piece of filament on spool?

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I've seen people make filament splicers. It's basically just a metal block with a hole drilled through it, then split in half. Place the ends of two stumps of filament in the thing, close it, heat it up, push the stumps together, take out and let cool.

Personally I'm way too lazy for that though and toss it out or do test prints with it.

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You don't need (and can't get) a FUSE - it was apparently a scam, in which I and many others never received anything for our money.

Instead, use the Change Filament feature of the UM2.

Start a print with the smaller amount, then "change" the filament to a new spool of the same stuff. Do this while it is printing fill, so it doesn't show on the outside of the piece.

You need only waste a piece of filament a little longer than the Bowden tube.

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