Merlins U-Boat V1.1b – Build Instructions [featured_image] Merlins U-Boat V1.1b - Build Instructions Download is available until [expire_date] Version Download 1535 File Size 561.57 KB File Count 1 Create Date 10 July, 2015 Last Updated 9 May, 2026 Merlins U-Boat V1.1b - Build Instructions ROG Ginger V1.0a – Build Instructions ROG Tri-Vibe V1.1 – Build Instructions