Yes, this looks well too.
Put the gearbox on the bottom bracket. Go to the Overdrive mode. Let the chain out of the gearbox (like on your picture). Then make some rotation with the gearbox as you would crank and listen if you hear something not "normal" inside the gearbox.
If every thing is Ok, trie to crank back a little, just so far that the first pawl jumps over one of the teethes of the cogwheel and than crank again to the front. Does this sounds Ok?
This looks like the case I described with: "But a kind of slipping could still appear if you just begin to crank."?It seems to slip mostly under light pressure, while sat down pedaling, not under heavy pressure on the pedal as much.
Put the gearbox on the bottom bracket. Go to the Overdrive mode. Let the chain out of the gearbox (like on your picture). Then make some rotation with the gearbox as you would crank and listen if you hear something not "normal" inside the gearbox.
If every thing is Ok, trie to crank back a little, just so far that the first pawl jumps over one of the teethes of the cogwheel and than crank again to the front. Does this sounds Ok?