SigmaDrive shaft coupling

[gale...@gmail.com]

A few years ago I posted a question to the group on the SigmaDrive coupler distributed by Brunton but unfortunately the conversation drifted to shaft seals. Good info but not specific to the transmission shaft coupling application. I have a good friend who has a SigmaDrive installed on his wooden boat and is very positive on the vibration and noise reduction. Since us J42 folks don't have the Aquadrive system, I am considering a SigmaDrive option.

Has anyone investigated or have any experience with this drive shaft coupling system.

Galen

Tango, J42