It's not clear exactly what you mean by "no servo wire insulation". While vibration is not a concern like it is in gasoline powered planes, you still need to secure the wiring. Wiring can flop around due to airflow through the fuse and during airplane maneuvers. You need to make sure any wiring near the air inlets and turbine intake is secure so that it can't get sucked in. Rubbing and chafing of wires can be an issue. Any wiring near the engine tailcone and tailpipe need to be insulated from the heat.

Joe