OBJ Model Inventory problem

I used an OBJ model in my mod to render a block. While it renders ok, I can't get it to render when being hold or when in inventory. I have tried registering it in many ways but it still doesn't work. The item in hand appears as purple/black cube and in inventory as a 2d purple/black texture. (There is no error in console):
 

ModelLoader.setCustomModelResourceLocation(ItemSnail, 0, new ModelResourceLocation(ItemSnail.getRegistryName().toString()+".obj", "inventory"));

ModelLoader.setCustomModelResourceLocation(ItemSnail, 0, new ModelResourceLocation(ItemSnail.getRegistryName().toString()+".obj"));

ModelLoader.setCustomModelResourceLocation(ItemSnail, 0, new ModelResourceLocation(ItemSnail.getRegistryName().toString()+".obj", "normal"));

ModelLoader.setCustomModelResourceLocation(ItemSnail, 0, new ModelResourceLocation(ItemSnail.getRegistryName().toString(), "inventory"));

ModelLoader.setCustomModelResourceLocation(ItemSnail, 0, new ModelResourceLocation(ItemSnail.getRegistryName().toString()));

ModelLoader.setCustomModelResourceLocation(ItemSnail, 0, new ModelResourceLocation(ItemSnail.getRegistryName().toString(), "normal"));

(I am not into blockstates that much)

Here is my JSON file in blockstates:
 

{
    "forge_marker": 1,
    "defaults": {
        "textures": {"#sn": "mymodname:entity/other/snail"},
        "model": "mymodname:snail.obj"
    },
    "variants": {
        "normal": [{}],
        "inventory": [{
            "transform": {
                "thirdperson": {
                    "translation": [0, 0.09375, -0.171875],
                    "rotation": [ { "y": -45}, {"x": 0}, {"z": 170} ],
                    "scale": 0.375
                },
                "gui": {
                    "rotation": [ {"y": 90} ]
                }
            }
        }],
        "facing": {
            "down": { "model": "mymodname:snail.obj"},
            "up": { "model": "mymodname:snail.obj"},
            "north": { "model": "mymodnamet:snail.obj", "y": -180},
            "south": { "model": "mymodname:snail.obj", "y": 0},
            "west": { "model": "mymodname:snail.obj", "y": 90},
            "east": { "model": "mymodname:snail.obj", "y": 270}
        }
    }
}

What am I doing wrong?

Edited August 5, 20178 yr by GeorgeTsak
Added some info