This
Not exactly. Trustees can be added and deleted as needed. Unless you want every listed trustee printed and photographed, change the trust for the new purchase. This is what the amendment is for. And, it was written up after consultation with the ATF, nothing hinky about it.
Proper legal answers about questions like this is why you have a real lawyer draw up your trust, not a DIY project with willmaker.
Without a trust, you and only you can use or posses the item, without you being there. Family member or hunting buddy want to go hunting with your can? No trust? No can do.