2016-03-23 During the last days, I had a lot of problems with jams in the printer, mainly when duplexing. There a no jams if the paper is released through the back door, however, but no duplex printing can be done that way. My web research leads to the assumption that the sensor for the final flaps might be broken. The vendor sends a replacement printer now. http://marmaro.de/lue/ markus schnalke