most of the things I had at home, I just bought the mirrors, using scissors as a terrible drill lol, the difficulty was the 150mm pipe, I wanted to do it so much that I cut two of 100 and spliced them in around 170mm tube, the focuser was a refractometer modified for such purpose with an 11mm lens barrel was a little smaller than the Japanese ones but it worked. There was a kind of relay lens on the tip of the refractometer that I removed later, which is why from a distance it didn't look like 900mm.