I can only echo everyone else. You are a master at this good Sir! Yet another amazing piece.
Regarding painting vs not...I love to follow along with the progress. I'm stunned by the unpainted one and then am always afraid it'll be somehow less after you paint it but so far you haven't let me down.
@toxo, a journey of 1,000 miles (or km ) starts with a single step. Grab some leather and start googling and you'll find some starter advice. @ABHandmade has a few tutorials of how he does it on here as well. There is some building up of the underside with other leather, some molding and shaping, etc. First though, you gotta do it, and in this case, likely fail a whole bunch first dozen tries or so, and then one day we'll all be drooling over your stuff like we do ABH's.