is anyone using an arranger keyboard synced to a sound module or synth?

i am looking at buying a PSR S900 and syncing it to my motif XS for the sound output.

just wanted to get some ideas from some people who have experienced this?

thanks
Nick
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Roland G70 / Roland BK9 / Roland GW8-L / Yamaha Motif XS / Technics KN6500