When using the AMNPS with the GOSM, I placed it right next to one of the air vents in the bottom side, on a shielded platform. This only works with the wide body GOSMs. The Master Forge discussed in the linked threads is just too small a footprint to allow proper separation of the burner and the AMNPS. My GOSM is 24 inches wide.
Photos of the placement in the base of the GOSM.
One of the very early tests of using the AMNPS in the GOSM. You'll notice the burner is functioning during the "hot" test.
The glass in the door is one of many modifications I made to the GOSM. I guess I'm just a tinkerer at heart.
It works. The key is getting the pellets started correctly, placement next to an air intake and the heat shield. The bottom photo demonstrated the need for a heat shield, because as the pellet burn got to the near end to the burner, they flamed up and I got a very short smoke out of it.
Taking the AMNPS trials to it's final conclusion, for me, resulted in me hanging a CharBroiler Side Fire Box on the GOSM (I was experimenting with adding lump or briquets as a heat source to the GOSM capability). You can see the addition in these next photos.
As you can see, it is possible. Todd, the owner of amazenproducts, uses many volunteers to help develop ways to make his products work in all of the variations of smokers. Any other questions? Please ask, that's what we're here for. I'm in no way an expert at this stuff but I do love to tinker with very basic skills.