This can be a lifesaver when you have uneven surfaces (like a carpet) and the connection is loose. Trains will stuck or they have to jump.
If you print these on the sides there is no need for raft/support and it won't break easily (you have to print on the sides actually!).
There is a lighter and a stronger version both prints in about 10-12 minutes.
brio_level_clamp_01.stl |
brio_level_clamp_02.stl |