Lee Sonko wrote, On 2009/08/21 00:51: > Anecodal evidence from a friend and myself in 2 different locations suggests > the ultrasonic units work. Ultrasonic is a very inexpensive thing to implement compared to all other solutions in regards to this current issue. Why not just do it and if it fails start discussion something new? -- Rubin Abdi rubin at starset.net