Do it Mike! Don't think you would need 4 layers, 3 would probably work.
Here is a pic of my very first Conus build back when I was learning. I nicknamed it Training Wheels as it is what I was shooting while Arturo was teaching me to shoot. It is made of 1/4" layers of Red Cypress that I got from a work friend many years ago. Not a very dense wood but layered it was plenty strong enough.
The picture isn't a can cut as I could barely hit it in those early days of PFS shooting.
