Ahh good point, I'm using two 0.47 ohms at the moment, would I be better reducing this value or doing something with the base bias?, I know the AoE has some good circuits for that.
The decoupling is about 2000uF from a linear power supply, the DC current draw seems to be around 20mA at +-6V although I'd need to get my meter out for an accurate measurement.
I'll try increase the supply decoupling and go around checking the currents and voltages in the morning.