Model snowplow train. 3:12 video.
https://www.youtube.com/watch?v=_DU0wDFWub8
Previously:
https://www.homemadetools.net/forum/...824#post137093
https://www.homemadetools.net/forum/...934#post156696
https://www.homemadetools.net/forum/...430#post146810
https://www.homemadetools.net/forum/...010#post149172
https://www.homemadetools.net/forum/...347#post154436
