can i use my futaba 9cap with a raptor 30

sure can.
I fly a Raptor 30 and a Raptor 50 on a 9CAFS

Yep, software is identical. You will want to pull the battery and rf module, open the back of the transmitter. On the throttle stick you will see a metal tab that makes it ratchet. Take out that phillips screw, turn that tab upside down and put everything back together. The throttle will now have a smooth feel, you want that for a heli. Actually once you get used to it you will like it for plane flying as well.