Last weekend, I decided to re-servo my TSA Infusion 600N Platinum helicopter. After several weeks of researching and comparing a lot of different servos, I decided on BK DS-7001HV servos. These servos are amazing! loads of torque, super quiet, very smooth, and lightning fast. They are also capable of running on 8.4V, although I am only going to run them on 7.4V. I just don`t like to max out the voltage just because a product can handle it. Better safe than sorry, right?

I have only put 8-10 flights on them so far, but I am really happy with them. I will have more updates on what I think about them, as I get more and more flights on them. 

Specs:

Operation Voltage: 6-8.4V
Weight: 68g (2.4 oz)
Torque: 21.3 kg-cm (295 oz-in) at 8.4V
Speed: 0.049 sec/60 degrees at 8.4V
Dimensions: 20x40x37 mm
Frequency: 1520us/333hz
Gears: Metal
Motor Type: Coreless