Tool changing
All substantial reviews treat the four-head architecture as a genuine improvement in colour-change speed and purge waste.

Four-toolhead CoreXY printer designed to make multicolour and multimaterial printing faster and less wasteful than single-nozzle feeder systems.
All substantial reviews treat the four-head architecture as a genuine improvement in colour-change speed and purge waste.
Independent testing consistently reports strong print quality and fast multi-colour operation.
Reviewers saw early quirks, and owner reports show some sensor and multimaterial edge cases remain.
For frequent multicolour users, reviewers repeatedly see strong value relative to older tool-changing systems.
The architecture is far less compelling if most jobs never switch colour or material.
The main tension is between very positive editorial testing and a smaller set of owner reports describing filament sensing and multimaterial glitches. CAIBI treats those owner reports as a reason to avoid overstating maturity.
Found the four-tool system fast, low-waste and unusually accessible, while cautioning that the reviewed unit was early hardware and the enclosure is extra.
Read review ↗TechRadarPraised exceptional speed and accessibility for a four-head design, but also noted quirks associated with the early review sample.
Read review ↗3DnativesLab review positioned the U1 as a serious shift toward dedicated multicolour/multimaterial printing and highlighted the differentiated tool-changing architecture.
Read review ↗Irish ExaminerAfter more than 200 hours of use, found multi-colour printing materially faster and cleaner with far less purge waste than single-nozzle systems.
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