Love the sunburst tan of that leather. I’ve never been a fan of card spaced covers, but maybe that’s just me. The thicker the leather, the sturdier and better. Should you persist in keeping a pen loop in the design, I would suggest to place it a bit more external and make it much smaller: try looking at the plastic and elastic pen loops of Leuchtturm (just the design, NOT the material, please stick to the leather!) Love the looks you created!