Ino-Lab HG-D760MG Digital Coreless Metal Geared Servo - £22.50 posted
Was used for one season indoors and worked faultlessly. No damage at all and all the original wiring/gears/casing.
Probably the most reliable servo I've ever owned, smooth, torquey and fast. 9.6kg + 0.09s @6v.
Uses 25 tooth Futaba spline pattern.