We used the Ritchie Tactician(~60$) in the Tybee and it performed well. It was easy to attach to the tramp, and was easy to read from the wire. It only needs 2 screws with flat washers beneath the tramp to install.

David Mosley
www.teamseacats.com

The men were amazed, and said, "What kind of a man is this, that even the winds and the sea obey Him?" Matthew 8:27