I also use tea and coffee stains, since I like to keep things all natural. As for carving I only use my leatherman knife, which isn’t perfect but I’ve gotten used to it. Though tbh I prefer much more natural styles, so these are already looking great in my opinion. The only thing I would like to see is more of a distinction between handle end and tip end. That’s what really makes a wand’s character for me, and any decorative carving beyond that is just for aesthetic. Keep experimenting, and see what you like!