I doubt you'll get a Do with OS 1.20 any lighter than a Funtana X100 & same engine. You'll probably be around 8 to 8.5 lbs with that combo, my X100 & OS 120 was around 8.3 lbs. My Do (.60) with OS 1.08 is 8.25 lbs & a real good combo, the pull out is just enough. Same with my X100, the pull out was acceptable, not rocket. You dont need rocket vertical thrust to get out of trouble, what you need to do is get a lot of practice "flying" out of hovers. Even if you can harrier out of hover, thats good too. You want to be able to come out of hovers in any attitude, once you are comfortable with that, thrust will seem less important. In fact, its cool to transition from hover to HA KE, make a point of coming out inverted too, then the transition will become second nature.