Hi,
Sorry missed your reply. I had a little bit of success of CF, I used the Hardcore Nozzle for 3D Solex. We have now sold the UM3 as it just couldn't produce the quality of prints that we needed. We tried all sorts of retraction settings and just couldn't get clean prints. The support material used to drag and get caught on the print, and then obviously when you dissolve it you get an imperfection on the surface. The CF material also dragged and left bobbles on the print surface. Everything we tried with success on the UM2+ didn't work on the UM3, nothing else we tried worked either. We actually got much better results with the UM2+, the UM3 just wasn't for us.
BR
Rich