Well, it means the glue used to stick the shaft and cone together is worn out and breaking. There's a few posts about, as long as I remember. You have to separate the handle from the cone and you can use super glue or epoxy resin to reinforce the shaft and the cone. Sorry for the vague information, I can't remember exactly
Hmmm.... Thinking about it, I'm not too sure because, I bought a Voltric 80 (4U) after I bought my Z-Slash TH
So i tried out the voltric, it felt very similar to the z slash smashing was easier on the voltric yet smashes on the z slash were much better. I dont know if i should sell a taufik and get a peter gade voltric 80 or keep both.
Thats how I felt when I first bought a Voltric 80. The head heaviness is really good for smashing, I have a 4U version which makes it later which makes it faster and easier for myself. If you could, I would say that you should buy a Voltric 80 and use it for a long time because I felt that "short-term" testing, it felt good but over a longer time it feels different. If you don't like the Voltric 80, you could sale it and still keep your precious Z-Slash TH