I love the sound of this. Just my sort of smells. I do not see any flowers going on here. It sounds like it could take a jasmine or frangipani heart with maybe a bitter orange top note (or mandarin or tangerine).
I'm no expert myself though. Take a drop or two out of your mix and try with that first. I would hate my suggestions to spoil your lovely leather smell. I have been trying to get a leather smell for myself. Would you be willing to share your recipe if I gave you one of mine? You can PM it if you don't want it visible.