RE: affect of higher voltage
ytell, actually 900kV is "sweet spot" for 3S on F3A, acro, 3d applications. You would want to go 4S on a motor with 900kV only on something that needs more speed, hence a hotliner. I would suggest to stay on 3S and go to 13x10.</p>
If you wanna go 4S then 4250-700 is the right choice with 12x8, very good combo!</p>