I'm a little confused about the engines you are talking about for the .46 size U-Can-Do. I would absolutely steer clear of a .60 two stroke on this plane, it is way to heavy and a short blip of full throttle in a strait line would most likely shed the tail and ailerons and so forth before you had a chance to react. I was using a Magnum .52 and Supertigre .51 on mine, which both have plenty of power. The magnum started going deadstick in prolonged midrange flight about half way through pattern practice,, so I put the old reliable OS .46 FX with a tower muffler and APC 12.25X3.75W prop on it. I tach 13,400 on the ground and pull the plane verticle like a homesick angel. I was flying in 95degree heat at 880 feet above sea level, so if you are lower and cooler, a .46 to .52 two stroke should give you all the power you want, all three two stroke engines hover about 3/4 to 7/8 throttle and pull out just fine, with the .52 pulling out and accelerating verticle. My plane weighs 5.5 pounds dry.
I tried a Saito .72 on mine and it did not hover or pull out at all, with any prop combination. One guy is using an OS .70 with a 14X4W APC and hovers great. I would have thought the Saito, being lighter would have more power, but this case it didn't do the job. The new .82 or .91's do great on this airplane, so your enya .80 should work great with a 14X4 or 15X4 prop, whichever gives you the revs you need for your ambient conditions. This appears to be your best choice, without buying a new engine. Hope this helps, gotta go to the field, calm day, and gotta work the rest of the week.

Happy Landings,
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