I feel when you get a rotary machine to light you have to push the needles more-so i use a heavy grip to add a bit of weight. I have some realy heavy coils but they have the weight forward so they are not to bad-but I use a bit smaller metal with rubber gorilla grips on them to absorb the vibrations.
I did like the first neo's but they seem abit off balance most of the weight was toward the back.