[bojan]

After I finished the turret with prism (still not tested it, Melbourne weather is not helping), I decided to try another design, 3x, straight....
Eyepiece barrels are same again (from Bunnings, $1 each)....
The calotte looks acceptable outside, but it didn't turn out perfect on the inner side (bridging), which is more important from the functional point of view. So I am thinking of doint it in two (thinner) parts, and glue them together, to avoid excessive post-machining.