Hi Tharshan
Take a look at the Wersi OAS instruments or a Mediastation and you will find that you will not need a multitude of keyboards, as you can do it all with one.
If you still want the Fingerboard then Wersi does an Expander, so that you don’t need to purchase another keyboard.
Enjoy your dreams

Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).