Yeah.. I think it is. I get a pretty low speed idle now and pretty dang smooth. I think I am trying to set the idle to low for the cement runway and apc 16x6 (to keep it from moving) and it goes out. I am thinking about getting one of these too:
http://www2.towerhobbies.com/cgi-bin...&I=LXDZ82&P=ML
To keep it from going out at low idle.

The 16x4w just has too high of rpm for the ys 1.10 it seems. Thinking about buying the apc 17x4w or a zinger 17x5.