Those AMR servos look nice, but this is the first I've heard of them. I prefer brands like Hitec, Blue Bird, and Savox. What I like about Hitec's is that if something goes wrong, you send it in and they fix it. I have all 3 brands in my larger planes, buggies, and other RC. I usually skimp on price if the servo is going into a cheapo smaller plane, but will pony up the extra price for something I care if I lose it. I put a Hitec 7955TG in my Losi 8ight 12 years ago and it still is working fine. If it ever fails, I'll send it in. I do know guys that run the 7955TG unregulated and they do fine. I don't because 8th scale doesn't need anymore torque. The newer one is the 7950TH which is $20 more and can take unregulated. Come back to this thread and let us know what you picked.