Ender 3 upgrade to.....?

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I've got a pair of ender 3's both with SKR Mini v3 boards, different hot ends, different extruder setups, bi-metal heatbreaks etc and I'm thinking of upgrading to something newer, faster and with an enclosure..

Anyone done similar?

 

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Never heard of Qidi tbh, they any good or just a cheap Chinese copy of something more mainstream?

K1 is on the radar, mostly print PLA but occasionally bits in TPU/Ninjaflex, speed increase is deffo something I'm mainly looking at.