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
LEGO 8288 Technic Crawler Crane MISB for sale online | eBay
LEGO 8288 Crawler Crane Instructions, Technic
LEGO 8288 Crawler Crane Set Parts Inventory and Instructions - LEGO Reference Guide
Compact Crawler Crane 42097 - LEGO® Technic - Building Instructions - Customer Service - LEGO.com US
LEGO 8288 Crawler Crane Instructions, Technic
BUILT) Lego 8288 Crawler Crane, Hobbies & Toys, Toys & Games on Carousell