Ok... so, sorry for posting once again, but using BOTH forward servo holes (forward rear hole.. and one counter weight hole), I ended up with tons of room for my 603 receiver, and RS pro. I shorted the servo link arm up all the way to as short as it would go, and everything looks good. I have full servo throw both directions, looks smooth and nothing hits. Here is a PIC: Question... is the 9551 supposed to be so tough to manually turn? My normal crappy servos turn really easy.. this guy is SUPER HARD!