We'll it works. It works pretty much as I had hoped. I did a little lining today and it was easy. However the needle sits a little forward of center in the tube and although it didn't cause any problems, I could see it causing spraying. Or the needle eyelet could possibly slip off if a rubber band were to break. Maybe if the tube vice sat further out and the needle bar was just a little longer it would be perfect. I would say that now it gets almost a full millimeter of give. I think it would be best suited at 7-9 rls. I used a 5 today, but I almost thought it was going in too fast.