Ive got 15 gram sliders 20/ 12 works for me,. I got a elec. file 1/2 inch wide to slope the ramp of the variator, I got 60 grit and 400 grit sand paper, for the file ,. I had to file the side of the file so it would fit in the ramp,. about 1 mm. off,. wish I new how to send pictures, I am much better with a big hammer,. should have had computers 75 years ago. when I was young,.