Alternate Builds Blacktron II Blacktron II Alternate Builds Instructions Added Large Alt Build Large Builds Space 6981 – Back B September 22, 2019April 4, 2023 Master Builder 2863 Views From: 6981: Aerial IntruderName: Genesis 1Instructions: View PDF | Download .io File Back B ContributionsName, PDF, and .io file submitted March 29, 2020 by: pfunkadunk