To be honest, we have already experimented with Fastlane for months but it will not work because:

1. Fastlane is also bound by region. When you run fastlane on your computer (USA), and try to use the token on a Europe server, it will fail. We can't be setting up mac servers across the world :\

2. I have also seen through their issue tracker and from the looks of it, we need to wait for Fastlane to update every time Apple does a major release because it may break.

Fair enough, and I really do understand. Just something I came across and thought I would share it. I'm making slow progress on my own build, but I will probably need to wait until I get the Professional Account to do this right.

Thanks for understanding Daniel! We actually delayed for months just to deal with these nonsensical requirements by Apple.

By the way, you can refer to the guide at https://stackideas.com/docs/esnative/administrators/advanced/manual-build-from-downloads . If there's anything missing from the guide, please let me know so that we can update it.