The most unhinged ways to transport items and yourself around your factory. Fling items around with Thrower Inserters, launch your trains off ramps, and soar through your base on electric ziplines!
Some mods requires to show something over your hatch entities.
So I think it is not extendable if you use a value == 255 (selection_priority property's max value).
Could you change it to 200? it's something between "arrow" and "cursor" if we treat it as a same value as the render layer value: https://lua-api.factorio.com/latest/concepts.html#RenderLayer
