You have to, at some point, admit you are in the minority, Ian. I know it's YOUR preference, but it is definitely a minority viewpoint. Or there wouldn't be ANY 76's, whether arranger or WS.

It seems that many, many players are perfectly fine with playing piano parts on a plastic 76. And, given that they also like to play organ parts on the same keyboard, wouldn't choose a 76 fully weighted wood even if one were offered. Once you decide to use ONE keyboard, and decide you want it to be able to do EVERYTHING, a plastic 76 is almost your ONLY choice.

But if you are willing to be unable to do certain things at all (let alone badly! ), a 61 is the perfect choice, or maybe a wood 88. But the moment you decide to play outside the tiny arranger 'box', having more keys is a necessity, not a burden.

For YOU, it works great. But for everyone that has ever bought a Yamaha 76, let alone another brand, your decision is NOT the right one. Take your argument to a WS forum, and see how logical they think it is...
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An arranger is just a tool. What matters is what you build with it..!