I'm flying a Senior Telemaster ARF on floats with a old magnum .80 four stroke and I have plenty of power for flying scale. I'm sure your 61 would have plenty of power. The only thing I really don't like about the ARF is the covering sucks. It looks fine for about a month and then starts to peel off in places. Also, beaf up the tail section with some triangle stock or additional balsa, the huge stabalizer just wobbles around supported only by thin balsa sheeting.