Reply to "Convert From Common Cathode LED wiring to Common Anode for 3 Light Aspect Signals?"

I have been watching the developing convert from common cathode to anode and am aware of the dual transistor OR function of the original schematic. It's solid with two PNP transistors in terms of various LED choices. I have to say that the voltage starved sensitivity to component choices leaves me somewhat anxious. I think a solid OR gate like a PNP with a couple of diodes on the base would eliminate all the component variations. Simple and devoid of a lot of testing. The idea is if either of the 556 timers outputs is positive, then the green LED is off. No problem. No issue with voltage either power supply or LED choices.