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Early miniature models often suffered from fragile plastic constructs or degradation over time. The 21-29 series introduced resilient, long-term preservation materials. Faux-baking and modeling compounds transitioned to high-durability polymers that completely avoid decay, ensuring that complex displays remain pristine indefinitely. 3. True "Plug-and-Play" Accessibility
Often, retailers will sell the 21-29 range as a complete "Hit Box," which is usually more cost-effective than buying individual blind boxes.