I have just fitted one of these on steering.
Are you saying it won’t last on lipo.
http://www.jrradios.com/Products/Tec...D=JRPSZ9100HVT


Z9100HVT High Voltage Ultra Torque Servo
Specs
Size Category: Standard
Type: Digital
Application: 1/8, 1/5 on-road, off-road surface vehicles steering
Torque: 480 oz/in (2S Li-Po)
Speed: .12 sec/60°
Length: 1.58 in
Width: 0.82 in
Height: 1.57 in
Weight: 2.6 oz
Bushing Or Bearing: Bearing
Bearing: Dual
Motor Type: Coreless
Connector Type: JR
Gear Type: Metal
Gear Material: SuperSteel™
Voltage: 7.4V (2S Li-Po)
Deadband: Surface optimized