I have watched a lot of vids as I have worked on my 938 mods. But I often forget some step along the way. I found these made by Hogue today and they were really clear on disassembly and reassembly of the action.
Disassembly Part 2 of 2 Installing a Hogue Mainspring Housing for a Sig P938 / P238 - Reassembly - YouTube
Reassembly Part 1 of 2 Installing a Hogue Mainspring Housing for a Sig P938 / P238 - Disassembly - YouTube
Disassembly Part 2 of 2 Installing a Hogue Mainspring Housing for a Sig P938 / P238 - Reassembly - YouTube
Reassembly Part 1 of 2 Installing a Hogue Mainspring Housing for a Sig P938 / P238 - Disassembly - YouTube