This piece was needed to keep small marbles on the Lower Zig Zag 2F up and out of the way of the large marbles on the Triple Splitter. It also solves the issue I had with the Lower Zig Zag 2F being too level for the marbles to roll on it without a push.
I made a demonstration version of it with the intention of having the characters make the real one on the track, but it was so crowded with three marbles rolling down Triple Splitter Small Feeder (et. al.) that I just glued the demo track into place. I’ll have Reversible Guy fidget around the piece for a bit so it hopefully looks like he made it.