Crow either you got a very heavy plane or you like 'tons' of extra power!! I have'nt even 'opened' up (flown at full power)my .91 fx yet- it's still fresh and not 'broke in'--But yet I find it to be VERY overpowered for this plane!! I can only imagine how muchh power it will have when I get her broke in! My plane came out at right at 7-lbs. So obviously a very good running .61 will do just fine!!
And for a person just starting out on this plane low rates is defanitly recommended!!! Just look at all the posts here on this thread alone with 'everyone' talking about the sensitivity on the elevator and with the tendancy of the plane to snap on high rates!
So anybody who has not flown this plane yet-'Take heed' you must start out on low rates and then go from there. Then after your comfortable with the attitude of this plane move up to high rates! Unless you have got wads of cash to be tossing around for unessesary crashes and repairs, (most of us dont) You should never start on high rates, Especially on first flight setup with a plane of this nature,(Or any plane for that matter!!) And given the tendancies and characteristics it has your much better off starting on low rates!!!--------'Just my opinion'