Greetings. I'm slowly learning to move in the forum, so it's time to comment. I'm following your thread and you're doing a great job in this great model. Small cones and cylinders are delicate, difficult to manipulate, shape and close. After many failures I came to the conclusion that the best result I get with thin paper, although it is more fragile and does not give margin for error when closing, it is very easy to shape it if we use an entire arsenal of cylindrical elements of all types of material and measures.I use all kinds of things, needles, toothpicks, brushes, wires, etc. And other things, very good light, glasses and patience.I watch your great construction.