I've had a couple of the DP Ultimates, and flew them variously with Saito 150s, OS 160, and a Brison 2.4. I can tell you that the OS was by far the best, the Sato flew well, but not unlimited, and the Brison was a Pig. More power than you can imagine, it was like a slingshot out of the hover, but the weight made it fly horribly. glide was like the space shuttle. Total weight with the Brison was 12.5 pounds. Keep the DPM light, and it's awesome, let the weight get up there and it sucks.