Need advice on building and using Halo mics
 

In the past we've used Shure WH30TQ headsets with our Shure wireless for musicals. They are rugged and get the job done. For smaller faces, I want to try making some halo mics (Microphone Placement Techniques for Theatre - Bright and Loud) using the Shure WL93 omni mics which are about half the price of a B3.

Has anyone used the WL93 as a halo mic? Any tips?