Here and there I have read that occasionally, during flushing stages with piezo-flush some of nasty issues with print head, dampers and sealers go away. I'm going to do the flushing first with my fingers crossed. If the PK remains troublesome, then we will proceed with mapping out that channel.
Is the " mapping out " service a costly one ? As Brian mentioned after all this is an older machine and more issues might come up soon.
At this point students are excited to start printing piezography and all our paper stock is matt. If there is a way to get around the PK dumping issue, I will place the order in a heartbeat.
Thank you Jon for taking time to reply