This post is about hybrid shafts that have a CF top and a wood bottom. Little is known about these but players' seem to react to them in a similar fashion to that of shafts made of a combination of CF and wood.
The hybrid and the combination CF/wood shafts appear silly, wacky, and gimmicky. Still, players and companies like them. Companies like the shafts because the combination makes the shaft stronger, more consistent quality, and cheaper wood can be used. It appears most McDermott shafts are combination shafts (G-Core and I-series) or carbon fiber.
The weirdest combination shaft and that looks like an upside-down hybrid shaft is Cuelees EX Solid that has two types of wood near the tip with "internal reinforcement of . . . various wood species", and at the joint end a sandwich of carbon fiber rods sitting inside and outside the hollowed-out maple wood.
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The wood dowel inside the hollow wood is replaced with a carbon fiber rod a few inches from the cue tip and continues to joint end. Nearer the joint, the wood core is encased with another carbon fiber rod to make the wood and CF sandwich.
Some swear by it. For example,
an AZer wrote about EX Solid:
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