I might as well add my 2C worth since I have used a Cline/OS 1.60. The Cline is harder to install, specially if you have already mounted the engine, you have to drill & tap the back plate for a pressure tap. The Cline does work well even with a big 1.60. I used it in a 72" Goldberg Sukhoi @ 12 lbs. because the 20 Oz. tank was leaning even if just rolling the plane. I think the air bubble gets so big in a larger tank and the fuel demands of a 1.60 doesnt tolerate air in the line, just IMO. Also, I have flown the GP Yak/OS 1.60 a few times, even did a little 3-D, the 1.60 (new) seemed good enough w/o any fuel system. We had it set pretty rich but it still climbed vertical out of site & hovered for a little. I liked the way the GP Yak handled,KE all day long with little coupling. It would harrier with a little rock, but a little rudder & aileron locked it in.(APC 18X6W). The CG was 6.25", the tail surfaces were a little touchy so we dialed in some expo, it lands by itself, floats with the nose up just a little, no biggy though, hope my friend lets me fly it some more!