I'm definately interested!
Fellow classic owner, Pat Griffith (sp?), has what I believe to be the best designed rear STB. It doesn't take up any trunk space or require any metal cutting. Best of all Pat has already road tested it, so the effects on handling are already known. Check out his website for the details
http://www.hmp.net/slowse-/diy/rear_stb.html
I think it would be great if Mike Saiki of Motivational could get permission from Mike Garner and Pat to duplicate their creation for mass production.