I have found it is extremely difficult to pull out the feed tubes from the tool head. If a customer or some internally needed to pull out the feed tubes from the tool head it could be easy to break something on the printer or injure yourself. It is likely we will need to pull out feed tubes in case of a clog or other repair. If there is a certain trick to it please let me know. I tried pushing on the blue tab but that did not seem to help at all.