Actually,
You're wrong. You can't get trigger bounce on the opto, that's one of the reasons that they designed the opto. In the LCD's and earlier IR3's that have microswitches you can get bounce, but not on the opto.
Philip,
What pin are you talking about and what do you mean full auto style bounce? Full auto style bounce is the only bounce there is. That's why people put bounce in the trigger, so you can get two shots per pull and release, that's what bounce means. And what pin are you talking about? You mean the actuator for the swith itself? I've never heard of anybody bending that by putting bounce on the trigger.