One of my hobbies is constructing stained glass, which is something I got into out of necessity while restoring an old house in Brooklyn.  The cost for replacing or, worse, restoring old stained glass panels was frightening enough that I took some classes to learn how to do it myself.  Fortunately, I learned that working with stained glass is somewhat the same as woodwork joinery so the transition wasn’t too difficult once I learned the tools and their tricky techniques.