Sooo…as promised a feedback about the U1:

• it did print a small (10x10x5mm) test cube without issues even without a hood. (Black Forest Filament ASA HF)

• with a improvised hood that was anything but airtight I achieved 57° degrees inside the hood (measured with a temp probe 10cm above the plate). (I literally just chucked my kids toy basket on it)

So. With a proper hood it should be no issue to print ASA in larger prints. But there are two downsides, well,one. The other one might be helpful.

• There is very little room inside the build chamber that is not used, very different from the P1S for example. That will make it hard to just chuck a heater in - it very likely would need to go in the top cover or somewhere else. I have ordered the Panda Breath,but that will take another month to arrive.

• The printer is very open in the bottom.(Literally jusf grated metal) On one hand this might be an issue if too much cold(or dusty) air comes in through that or too much air goes out through that that is then unfiltered.

So my current idea is to actually use the space below the printer for heating or to remix the hood from srinn to have space for the Panda Breath.