Height is the same but the xy order is switched so an um2 head wil be rotated 90 degrees....
While it is possible, would you want to give up the 3 min nozzle change ?
and instead having to disassemble the entire print head
you can have that on UM2 ... I would advice an olsson block (http://3dsolex.com/)
and this seems to be a smart upgrade to, people report longer lifetime on the ptfe ;
I believe it should be possible to put a um2 head on a umo.
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