This past weekend, I mixed up a liter of Patton's E-76. I'm a dedicated D-23 and HC-110 user but, deviate from my habitual use of these two from time-to-time. I've not tried E-76. It is advertised as an eco-friendly, metol and HQ free D-76 alternative. How does it compare to D-76 in actual use? Can D-76 times be used straight away? Is there likely to be any improvement in shadow density? How does it keep?