How to build a zipline

Below is where I got all the pieces for this zipline project.
Petzl Tandem Speed Pulley is available here: http://www.karstsports.com/petp21spetan.html

1" diameter x 18" long turnbuckle with jaws on each end (I actually used 3/4 x 24" but I said 18" in the video):
https://www.e-rigging.com/three-quarter-inch-X-18-inch-Jaw-Jaw-Turnbuckle?utm_term=&utm_campaign=Old&utm_source=adwords&utm_medium=ppc&hsa_acc=7830372009&hsa_cam=10115626785&hsa_grp=100426651606&hsa_ad=436922998974&hsa_src=u&hsa_tgt=pla-353967104601&hsa_kw=&hsa_mt=&hsa_net=adwords&hsa_ver=3&gclid=CjwKCAjw57b3BRBlEiwA1ImytuYUK0TbZ9t5tWeDoRwiCHMOYT0BwIK8eoNQy0enedOv4zzf-jwfpRoC6XEQAvD_BwE

Galvanized wire rope or steel cable here:
https://www.e-rigging.com/three-thirty-seconds-inch-x-250-foot-hot-dip-galvanized-cable

Carabiners:
https://www.karstsports.com/carabiners-connectors/

How to choose a climbing harness:
https://www.youtube.com/watch?v=bYXTzSEODqk
https://www.rei.com/learn/expert-advice/climbing-harness.html

Видео How to build a zipline канала mcwhitet