I use the musikant styles and regular styles from the Pa4x in my Pa4x, I’ve also added the styles from the Pa4x and Pa1000 not available in the Pa700. Some need a little tweaking but generally work fine.
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Gem Wk4, Solton Ms60, Technics Kn5000, Korg Pa50sd, Yamaha Psr k1, Tyros 4, Korg Pa700