Uploader: orangera1n 
Upload date: 12/24/2025
Source: betawiki discord - gus33000
Notes: This release has both the custom FFU for the surface duo (Flash.7z), and the original dump of the device (OEMSK Luns)

File Info from 7zip:
Name: BSP.wim
Size: 386797718 bytes : 368 MiB
SHA1: 7b2106311b84ac78b2b03a938df2b375c3093448
Name: LUN4.vhdx
Size: 272629760 bytes : 260 MiB
SHA1: e0c28b1ff8a2f51bc3a60d3e49d73be7a5d3162d
Name: LUNs_OEMSK.EV3.rs_prerelease_cfga.18236.1000.180905-1440.7z.001
Size: 3145728000 bytes : 3000 MiB
SHA1: 715b8ae922b836195984ecff93a0826b3fe0ae33
Name: LUNs_OEMSK.EV3.rs_prerelease_cfga.18236.1000.180905-1440.7z.002
Size: 3145728000 bytes : 3000 MiB
SHA1: 61b8b6815196fe39a517f8a6843ba977f11cfe93
Name: LUNs_OEMSK.EV3.rs_prerelease_cfga.18236.1000.180905-1440.7z.003
Size: 2373681698 bytes : 2263 MiB
SHA1: 749ac4ee3780e6b6ed2cba3f9f942b6b02873b8c
Name: Flash.7z
Size: 7150979100 bytes : 6819 MiB
SHA1: 8e03e1500f2d1e25f35f7656821794d80cb601b4