My 72 slot should work for you since his UI is based on my files, unless he changes a lot. What was the issue you ran into?
Try opening his windows.xml with notepad++ then search for wbackp. That will take you to the correct section, then follow the instructions within to disable the standard backpack UI and enable the 72 slot UI.
Then copy the assembly-csharp.dll from my mod and disable EAC and you should have a bigger bag.
If you hate the new bob and sway you need to download the assembly from the sgbb marked file instead where I turn the sway down significantly.
Hope that helps.
Please be aware that sometimes it looks like the mod ain't working when using it on an existing save. It fills to 32 and stops. If that happens remove an item and then it should work.