Actually, the metalwork on the 2a (including sled) was more expensive than the mk2 - we had supplier problems and the metalwork tended to be coated in grease/metal filings (not ideal for electronics) which required cleaning at the factory.

The mk2a metalwork suppliers did a very good job, and also improved the design of the lid (mk2a's have angled lips, which makes fitting/removing the lid much easier).

What build quality problem did you notice? I've always thought the mk2a's were marginally better made...

Hugo