Jerry Clowin has made a significant improvement to the method published in Golf Ball in Glass. It builds on that same basic method, but introduces an important refinement which allows you to overcome a bigger difference between golf ball diameter and jar opening. With this new method it is much less of a hit and miss, and the search for the proper jars has become a lot easier, too.

Besides safety equipment (safety glasses and gloves) you will need in particular three tools to accomplish this task. One tool pretty much every normal household has. The second tool is found in most workshops, the last one you...