More smoothy

首先感谢原作者的设计，设计的非常精妙，但我在长时间使用后还是出现了不顺畅的问题。于是我尝试发现问题的所在。Firstly, I would like to express my gratitude to the original author for their ingenious design. However, after prolonged use, I still encountered some issues with smoothness.So I tried to identify the problem.我发现耗材会特别容易卡在画红圈的这个位置，因此我想设计一个可以使耗材顺畅通过这一区域的零件。I found that consumables are particularly prone to getting stuck in the red circled area, so I want to design a part that can allow consumables to pass through this area smoothly.这是一个非常简单可以快速