LEGO Technic Crawler Crane (8288) /Toys by Unbranded - Shop Online for Toys in New Zealand
Mini crawler crane designed I came up with (cat for scale) I used set 42121 as the base and the instructions for set 8288. The hardest part was setting up the pulley
Got bored and remade the 2006 8288 crawler crane with random bricks : r/ legotechnic
LEGO Technic 8288 Crawler Crane with instructions, RARE | eBay