Sell Filament?

[curious aardvark]

why isn't it compatible ?

ie: what's the difference between the standard onyx and the fr ?

Given the way markforge work - it could well be the same stuff, just marked up for people who buy the more expensive machines.

Other than that - ebay is your best bet for selling.

But personally, I'd be inclined to try it, as you will never get back what you actually paid for it.

So the fr stands for flame retardant.

Hmm, now me being cynical and having worked in a number of factories over the years - I'd be inclined to try and set fire to a normal strand of onyx.
It's nylon and carbon fibre - neither of which are famous for their ability to power a bbq.

Could well be it's exactly the same stuff - just in a different package. Trust me - this is normal practice.

I once worked in a unit packing hand barrier cream. we made three grades. weak, normal and strong.
All three were the same stuff, came out of the same vat, but put into different labelled dispensers and sold at different prices :-)