Does the start box have a belt with gear reduction drive? I had one and it struggled to turn over my LRP .12 in my GT2 even after break in. The box that I have used since starting in 1/8th R/C is a direct drive set-up, rubber wheel straight of the motor shaft. This thing has never let me down, it has turned over VZBs and Ninjas first time even when cold and tight. This box has some major torque, you can feel it want to twist on the table.