Just wondering if the pain post opt is more from the incisions and excess gas in the stomach or from the stomach (organ) itself? Does the stomach organ have pain nerves?

The pain is in the muscle they have to go through to get to the stomach. I also had a lot of gas pain and it felt like pressure on my organs. But no, there was no specific pain in the stomach other than what you might experience with really bad gas. The gas went away in about 4 days or so, but the muscle pain lasted about two weeks. It got noticeably less painful each day.

minor pain from where they enter the wall cavity but the stomach itself, does not feel pain.

This is a great question!

For me the pain came mostly from incisions. I don't recall having any gas pains at all, but if you look at my pictures you can see how indented one of my incisions was concave.

The type of pain you feel from your internal organs is more like menstrual cramps (dull ache) and often makes you feel nauseous or light-headed, as opposed to somatic pain from, say, your skin, that is very sharp and makes you wanna go "ow!" and jump away. You'll experience both post-surgery.