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
Amazon.com: LEGO Technic 42042 - Seilbagger : Toys & Games
LEGO 8288 Crawler Crane Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO Technic 8288 Crawler Crane Sealed New | eBay
LEGO Set 8288-1 Crawler Crane (2006 Technic) | Rebrickable - Build with LEGO