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wrong way round pva sticks to pla but not to abs.

And yep, those prices are way out of my wallet zone.

you shouldn't need glue. Wax doesn't warp and sticks to pretty much everything.
Blue tape should be fine.

Those yodas look really good.

Any idea on the actual cost of the final product ? ...

looking pretty good :-)

Hmm, I'm guessing the flexibility with sufficient hardness to go through an extruder is the hard part.

Interesting though :-)