I don't see how any warranty issue comes up at all... All AJ has done is software related. Loading new styles and sounds and a tweaked OS should have NO impact on any hardware issues.

Does loading a Yamaha Regi-Stick void the warranty...? Of course not!

And, although Microsoft provide resources online to learn Windows, no-one expect THEM to publish "Windows for Dummies" for free. If AJ has written a BETTER manual than Ketron, why SHOULDN'T he sell it? Everybody bitches about not enough third party guides and DVD's, but here's someone doing it, and all you got is grief for him?

Chill, fellas!

BTW, if the original posts hadn't been taken down, most of this would have been self-evident. I can't for the life of me think why anyone would remove them...
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An arranger is just a tool. What matters is what you build with it..!