Contacting Visible Signals
Visible Signals is one person, based in Adelaide, Australia.
Postal Address: PO Box 168, Mitcham SA 5062, AUSTRALIA
The Visible Signals email account is monitored most weekdays and sometimes on the weekend, so you can usually expect a reply within 24 hours. But sometimes (e.g. if I go on holiday) it might take me a little longer before I respond!