I figured it out ! I just add a to_texture message connected to the jit.gl.render which gets banged right after the render itself is banged. Then bang the named texture object whose output is connected to the syphon server, et voila ! (All the bangs in order are from a trigger object per usual)
So psyched =) Frame rates look happy and the recorded Syphon movie looks smooth and happy.
Hope this helps anyone else trying to do this.
The Syphon Recorder and Server rock !!