High speed dental handpiece unboxing - NSK Pana Max PAX TU B2

I bought one of the many dental handpieces that are floating around on EBay - I want it for fine carving/modelmaking work. Still waiting on the control unit.

The handpiece claims to be a NSK Pana Max PAX TU B2. However, I'm unsure whether it's genuine or not, since it only cost £18, and the actual retail price of branded NSK handpieces is well over £300! Regardless, it looks very well built and spins smoothly.

For those who have never used a dental handpiece before (like me) - the bur is held in a clever little friction-grip collet. Pushing the button on the back of the handpiece releases the grip, allowing the bur to be inserted/removed. It's gripped sufficiently tightly that it'll never budge during normal operation.