Clamp-on brush rest rail for Planetary catcher

Getting into mini painting as a total neophyte, i printed a set of these nice (if a little over-engineered) painting handles by GoMorko: the Planetary Catcher: https://www.printables.com/model/1375080-planetary-catcher-miniature-painting-handles . 

Then I noticed that decades of mild alcoholism weren't exactly beneficial for my hand's steadiness, and also that there are special antenna-like attachments on some other painting handles designed to help with this exact problem.

So I sketched one in Fusion that would fit the handles i already had. Will most probably fit on the SpringedCatcher as well. Two sizes and files for Fusion 360 included. Enjoy!