Like you I have used both on various gassers,and I dont feel particularly secure with the single bolt.
I recently got a new ZDZ 60cc and bought the factory drill jig with it ,which makes drilling all those zilly liddle holes much easier,although I dont think I,d like to do this job without a drill press,jig or not.
I kinda like the way the six bolt set up looks,but I tend to like things scalelike anyway....