On my 54 Plus 4 I have the Rutherford rear frame to carry Koni Classic shock absorbers. They work well, but I have no comparison with the lever arm type as the car came with the Konis. The Rutherford frames are sold by Tim Ayres at New Elms, see
http://www.newelmsmorgan.com/I have no connection with Tim other than having met him and purchased other parts from him. You will find him very helpful.
By the way, did you receive the technical stuff on Plus 4 Moss boxes that I emailed you a couple of months ago?
Tony Quinn
