Can you identify these parts? Sliding brick and plate with a groove

Question

Please help me identify these LEGO parts - I'm trying to build them.

You can see the original video at youtube.com/…
– Ken
Commented May 7, 2016 at 17:34 — Ken, Commented May 7, 2016 at 17:34

Joost · Accepted Answer · 2016-05-07 20:31:20Z

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answered May 7, 2016 at 20:31

Joost

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Thanks! You're awesome! I hope you're having a nice day :)
– Ken
Commented May 7, 2016 at 23:36

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