I think the .61 is a perfect match for this plane. I was able to balance it with no added weight and it has unlimited vertical performance. It will spin easily but my current throws will not allow it to flatten-out very much. I can also get it to hover at around 3/4+ throttle but I'm running a 12/6 prop which is kind of a high pitch to be able to hover and have enough reserve pull to get out of trouble. Also, it doesn't have large ailerons and elevator so you have to be quick on the sticks to maintain a hover. Undoubtedly your Saito will work well with plenty of reserve power,but this plane doesnt have the thick 3-D airfoil and likes the faster aerobatic maneuvers.