Maximum g
Be aware that max g limitations on all aircraft manoeuvres relate to the design/build specifications and the margin applied to provide a safety buffer before it breaks.
Don't know what the margin was for a Chipmunk but probably two thirds ultimate.
Stick force per g for a Chipmunk or similar should not be less than five pounds.
Also be aware of the additional limitations you should apply in respect of Rolling Pullouts where you load up the upgoing wing an increased amount over what you will see on an accelerometer.
Perhaps there should be another thread on Rolling Pullouts for the further benefit of the uninitiated.