Gentle marble run for 8mm ball

thingiverse

A marble run designed to not require supports, as well as to use little plastic. It should work with a steel ball 8mm in diameter or smaller. Although this is finished and works well as is, there's more that could be done in terms of reducing the plastic required and print time. I would like to remove a lot of material from the base, as well as use some of the lower tracks to support upper ones instead of having them require such tall supports. The wall thicknesses could be optimized further as well.