I saw one stuck on with a drop of clear RTV (silicone rubber). When I
asked about it, the owner said it stuck up into the airflow a bit
better and was a little more responsive. He also commented that he
didn't fix his gaze on it nearly so often as the little triangle of
white tape that he used in the past. I think I'll try that soon, unless
someone tells me that the RTV will damage my plexiglass.

Jack Womack
PIK-20B N77MA (TE)