Ian,
All I got to say is--learn to use a board within it's limitations all you want, but there is a VERY FINE line between using a board within it's limitations and it flat out NOT being able to do something.

Sugarcoat it all you want, the FACT still remains that Yamaha's contruction of those wheels if of VERY poor quality. One SHOULD NOT have to feel the need to play ever so gently because of the fear that it will break. It should be STURDY and WELL CONSTRUCTED so that it doe NOT get in the way or hinder ones playing ability.

Well Peace Out!

Squeak