free papercraft harbor gantry crane:

Shaun Y. made this papercraft gantry harbor crane.

Download + build your own free papercraft gantry harbor crane (by Shaun Y. on Jon Leslie's The Lower Hudson Valley Paper Model E-Gift Shop)

https://papermodelingman.com/gallery_models_other.html#m4

(old link: http://jleslie48.com/gallery_models_other.html#m5a)