I finished making the backpack (´・ω・)ノ
Since the backpack is the main feature, it's quite intricately crafted, but it also has a unique design that I've never used with other kits, making it quite difficult to assemble.
I struggled for about 10 minutes with the M1 and M4, especially with the 8 parts, which were difficult to insert while twisting and kept getting stuck.
If this had come up on the Gunpla Proficiency Test, I'm sure I would have panicked and gone crazy (´･ω･`)w
But the finished product was well-made and worth the effort, and since I'm a GM fan, I was extremely satisfied to be able to build an Origin GM with the original face.

HG GM Sloop Production Part 4 (Completed) | かりやめて's Gunpla works