A guy at the field flew 3 different engines in his UCD 60 over the course of the season. He started with an OS 91 Surpass II: slow pull-out from hover with APC 15x4, hover @ 2/3 throttle. Next was Saito 1.00: marked improvement in hover and pull out, use 16 x4 APC. Hovers @ 1/2 throttle. Couple weeks ago, he shows up with a YS 1.10 sticking up out of the nose. (He mounts all his UCD engines upright.) Power was way more. Hovers @ 1/4 to 1/3 throttle. Awesome acceleration from hover. I don't remember the prop he had on the YS, but he wanted an APC 17x4.

I have UCD 60 with Saito 1.00, Cline regulator, APC 16x4, It's a great flier and power is very good.