"'Ultra light rotary for stippling?

So 20 plus years has begin to leave its mark on my hands. The pain was getting worse so I stopped using coils and am now using Spektra X's and its much better. However I still need to replace my Redmond rotary made for slowing it way down for dots with something lighter. Any suggestions as to a very light rotary that's made to run very slow for dotwork? DD okay but I don't really like them as much as in-lines. Jondix's machines I think are light.
Thanks in advance"

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2.5oz with and adjustable stroke. Each component is customized to the clients specifications; the finish, materials, vise screw, even the gaffers tape. I use one identical to this one for stippling at about 3v-ish, though you could go lower if need be.