I didn't know if your keyboard had a mic input. I'm guessing one of your TOP units must. If it does go with that and get your effects there.
I did a solo piano gig with one CM30 for my mic. No effects but it worked well. Booked for 1 hour and did 4. I love those simple gigs.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer