I used Elmer' School Glue on a binding recently but couldn't make a fine enough line with the orange plastic tip that comes on the bottle. Quite a mess. I looked at Sharon Schamberg's video about using it (sorry, probably wrong spelling of her name) and saw that she had a metal tip on her glue bottle, and she mentioned using it, but I can't find this metal tip anywhere. Does anybody know where I can find one? How to order it, etc?