That's a real common circuit for headphone amps - a push/pull emitter follower transistor pair enclosed in the feedback loop of the opamp. That schematic is the simplest version. The performance/fidelity can be increased by biasing the transistors with diode/resistor pairs (D1, D2, R5, R6 with 100uF caps just to stabilize the voltage across the diodes) and putting in emitter resistors:
**broken link removed**
It also blocks amplification of DC by putting an electrolytic in the feedback network. This only does 1.5W into 8 ohms off 15V supplies, but some beefier transistors would probably help. If he only needs voltage gain then this is moot. I don't know what it takes to drive a galvo.