Built to Last.
This is probably one of the most complex wallets to built when it comes to hand stitching. Layer after layer you must assure everything is perfectly finished before proceeding to assembly and that’s where it all stands.
If it doesn’t come right the first time, keep building.
I started to working with materials as a concept car modeler and I always remember how hard we kept on working before we could even see the car take shape. For some complex models we could take months before even starting to see the fruit of our work. And I think the trick actually resides in just that, taking time, having the patience to build with a vision in mind and no matter the complication you come across to just keep going until one day everything assembles properly and you get that final satisfaction. And when that day comes, do it again.