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.
Москвичам пообещали тепло17:31，更多细节参见新收录的资料
Resolved 3rd party remote connection issue with Xbox after sleep mode.，推荐阅读新收录的资料获取更多信息
write(chunk) { addChunk(chunk); },