Hi Mike,
The battery pack would be fine. I have gone to 1000 mah packs with the digital servos that (S3151) I'm using right now just for the peace of mind. I load check the battery pack between flight just to feed my Paranoia. [8D] I have had good luck in this engine range with the Great Planes "Nylon Spinner with Aluminum Backplate" spinners. I carve out the spinner to fit the prop and then balance the spinner and backplate together using a Du-Bro balancer. You can get Tru-Turn aluminum spinners cut to fit the prop you use and with a lightened backplate if you want. They a a lot more expense but they are nice.

Best regards,
Bill