ZBOX manual states runs ~ 60% tube bias
the ZSTAGE has two settings, Questions

a) anyone know what % bias (starvation) rates for ZSTAGE?
b) any chance of mod to ZBOX to provide two settings?
c) if yes, can the ZBOX be mod to provide 85% and 60% tube bias? as 60% seems to be a bit 'hungry'  i.e.  tube will provide warmth at 100% tube bias, and probably very clean and warm at 85%

thanks