How do couplers work?

Hi, I'm trying to figure it out how to use it, but it looks for me like it's completely random if it works or not. Could you guys explain it please?
2 Replies
Goteusz
Goteusz12mo ago
Also, do they work on monorail? okay, I think i now understand - they need to be HyperPerfectly aligned to couple UPDATE: no, it still doesn't work
IThundxr
IThundxr12mo ago
check the ponder
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