I will get over a year on the Arrow Line AL-35 gun and keep 4 in active rotation (with different lance lengths and types on them). The gun will start "weeping" after 4-6 months when the stainless steel ball develops "pits" in it and then I will just replace this ball with a ceramic one that I ordered at the same time as the gun. After that, I won't have any more problems with this gun until the trigger fails or an employee drops and breaks it. I will then reuse the ceramic ball on the next AL-35. I like the Suttner 2605 as well and have two of them as backups. I think all guns should come with a ceramic ball IMO.