Leather thickness

@zfikri.cmud To be honest, as @Fadi mentioned, I think you nailed it thickness wise.

To go thinner without removing more material, you can place the pockets once folded under a paring stone for 24 hours to compress the leather further and reduce thickness.

Mechanical pressure from a vice between two flat plates will also do the trick. Experiment with this though, as textured leathers will lose their texture and some veg tan leathers will darken where compressed.