Cryptography for Caesar Cipher and the Vigene ̀re cipher.
The raft was necessary for this ring. I tried it twice with no raft and the ring doesn't stay on the plate, so the new material is constantly being put down off target.
I've printed numerous of the decoders, using raft & support; but, they aren't sturdy enough to use. I plan to make it a little thicker and reprint.