In this video, I will be showing you how to build the SLS Block 1(crew version) in Spaceflight Simulator 1.5 without using the parts expansion( DLC). Music used in this video 1. Track title: A Trip Around the Moon Artist: Unicorn Heads 2. Track title: Dance of the Mammoths Artist: The Whole Other Chapters 0:00 - Intro 0:11 - Core stage 2:34 - SRBs 4:02 - ICPS 5:49 - Service module 6:52 - Crew module 8:02 - LES 8:46 - LES Staging 9:14 - Instructions 9:48 - Outro