Well, I won't be doing this shim mod. Apparently the Dr. Pulley sliders do allow the clutch to open farther, in fact so far that the belt is already so close to the sleeve, it may be touching it. If not, its really close. At least the belt wear on the sheaves is all the way down to the flat spot just before the sleeve. So, no shim mod needed for those that have sliders. I will show this in the video I did while doing the clutch work today.
I did measure for the shims though. The inside of the sleeve is 25mm and the outside is 35mm.
Update: It also looks like the camera was off while doing the work on the clutches so all I have is taking it apart and the secondary off and putting it back on. So, I may not do this video.