Bought a lathe a while back and learning at a comfortable rate, installation of tips, ferrules, and minor shaft repair. Recently I’ve experienced a tip separating when I was almost finished burnishing the side. A friend asked me how hot I made the tip and that probably was the cause. He went on to explain each layer of leather has been treated and adheres to the next so you know what happens when you heat up some glues, they become pliable. So my question is about the types of adhesives used between the layers of leather. As each layer becomes exposed it would obviously become a factor on the impact, if only slight. Is there a connection to what players experience with glazing? There are many players I talk with that have immediate success with particular tips and after short time they seem to harden and need excessive attention.