@toddreedjewelry reminds me of the bottom of a Montana trout stream. Beautiful! I can hear the sound of the water!
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Some good packing tips for fragile models:
1) Get some pillow stuffing (at a craft store like Michaels) and use that to surround your model. Use enough stuffing to fill (without compacting) one of our crush-resistant tins or an "Altoid" can etc. Pull the stuffing apart and "insert" your model in the middle, then place in the can.
2) Build prong supports in your models (see image below). It's a great solution - make a "prong cage" as (see image)