Based on the original author @braga3dprintI made it because my wife has so many large sunglasses. I designed a style that can be combined and made it compatible with the original design. The model doesn't need any support. Different materials may have different expansion coefficients, leading to varying friction, but these are minor issues. It can support up to four heavy sunglasses. I recommend using the same color for each layer. Multi-color printing will take more than three times the time. Wish you a pleasant printing experience!