I’ve written about the issues with the Lee Adjustable Charge bar (ACB) that I had and the solution to this problem. In my case, I only found out that it didn’t work for me AFTER buying it. However, if you are still looking for an adjustable power thrower for your Lee autodisk powder measure, I came across this clever solution (cf. rugerforum):
I have not tried it, but it seems a valid option. I’m just wondering if you don’t get into trouble with inconsistency with respect to powder getting stuck on-top of the screw (and falling of one time and not the other) and the cavity below the screw.