Guys,
I'd l;ke to build a friction call for my own use. I don't neccessarily need to make my own pot, but have 2 questons about building the call
1. Do I always need to use multiple glass in the pot or
is one piece (the top one)sufficient?
2. How can I apply graphics under the glass?
Thanks to anyone that can help me

<img src= 'http://24.124.38.72/uploads/barkmoonsign.jpg'>