This track section enables you to go around the Archimedes screw, so you can make use of it in the centre of a track. It can also be used to drop marbles through a gap so different paths can intertwine.
Laser cut plywood
Magets, and laser cut silicon non-slip stickers (so it grips the vertical surface)
Instructional build video.
Build time: 10 mins
Paint brush and wood glue not included, but if you need them check my shop.