Item creation tutorial?

To my knowledge, static items just use transformBone but other items use other weights depending on what the animation is. And the mesh will sometimes have separate parts assigned to separate weights. For instance, a stove will have the oven door and the oven rack assigned to specific weights while the body of the stove will be assigned to transformBone. What weights you use would depend on what you're making, I guess.

Unfortunately, I'm not experienced with Pose Player so I can't help there. Haven't done anything interactable, either. But, I've seen posts here regarding animated items that are interactable. I've seen plenty involving Pose Player, as well. Search the forums. There are also tutorials here that may help.

Some things involve not just specific weight assignments but XML tuning, as well. Just depends on what you're making.