Modeled is a simple mod adding a new command called /model that allows you to change the custom model data NBT tag of an item in your main hand.
usage:
/model set <id> -sets CustomModelData of item in your main hand to <id> you specified (accepts numbers from 0 to 999999999)
/model remove -sets the model of the item in your main hand to the item's default model
Notes:
/model command can be used in survival mode even with cheats turned off