Good progress this week. First of all I managed to get the pipe lengths cut. This was no minor job as the cardboard tube walls are 5mm thick. In the end I've decided on 2 straight sections and 1 elbowed section. The straights are 12" long to make them a couple of movements phases in Necromunda. The elbowed pipe is longer.
I also decided to construct a ruined node for a bit of variety.