I would just go get a new core how ever the machine was only about 3 months old when the issue with the print core started happening. I am trying to get it warranty replaced, there is no reason a core should go bad after 3 months of lite use. I barely have to change nozzles 6 months on my machines at home and they are considerably less expensive. After I changed out the core the machine has run for about 21 hours now with out throwing an error. So I am fairly sure that the core is the issue, at least in my case.
And we have looked at the 3Dsolex, what I love about those are that they can be rebuilt. I think when we have to replace the next core we will go with the Solex, at least that is what I am going to recommend.