I not have criticized this yoyo.
I critic entire category of yo-yo, the aluminum yoyo who have weight titanium rings, this is because given the low difference of density between the two metals in question, what you get, it would get equally using the only aluminum, increasing the thickness at those points… this without wasting a rare and particularly metal such as titanium to do only the rings (since even the rings are machined from solid bar), without increasing the production costs and without weakening an object (given that a object composed of several parts is more fragile than one mono-body)
this is my idea and is not just theoretical, why should not I express it? however, it appears to give much trouble in this place.