At the risk of getting deep into the weeds I’ll do this anyway. The picture below shows two glue guns and their glue bead samples. The gun on the left is the battery powered gun mentioned in a previous post while the gun on the right is a Surebonder DT-200F. As soon as I started using the gun on the left I noticed that it was easy to get a glue bead that was pretty consistent. It just seems more precise. They are both mini models which are good for smaller projects.