It fell into an interesting pattern that I could only describe as the shape of an arrow.
2.1 先检查环境，别装错版本，更多细节参见新收录的资料
10-Q filed every quarter。新收录的资料是该领域的重要参考
A. After referring a lot of sources over the internet and also during the assembly process of the telescope, it is advised to maintain an offset of ≥ 20mm from the size of primary mirror i.e., for a 6" or 150mm primary mirror size, 150 + (2*20) = 190mm should be the minimum inner diameter of your PVC tube.
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