It's important to remember that if a descent starts, rol off some bank. Just pulling back will simply steepen the turn and the rate of descent.
I must try BEagles idea of allowing descent to get a max turn rate, but I suspect the Chippy would get near VNE pretty quickly in such a manouvre, long befor it reches max 'G'.
(if this looks like happening, or anything else untoward, roll wings-level while whacking off the power, and pull out of the dive not exceeding max allowable 'G')
I'll try it and see (carefully!)
SSD