Nick, there are currently many fibre/plastic products that are equally as strong as metal, yet weigh just a fraction of their metal counterparts. ABS plastic, for example, is tough as steel, resists heat, hard to fracture with a heavy hammer, yet weighs next to nothing. A metal case does not make a great keyboard - it's what's inside and what comes out that really counts.

All the best,

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)