Horstman Slip-A-Just clutch

[Bill Peck]

I found an old slip-a-just clutch in my box of parts that I never used back in the day because the rev grip worked just fine on dirt which was where I did 90% of my racing. Now that I'm doing road courses,  I want to try it out this weekend at Avon. Problem is I'm not sure which way to move the shoes to get more or less slip. I tried moving them closer to the pivot thinking I'd get more slip, but, just running it on the stand against the brake, it seemed to have the opposite effect. Am I going the wrong way or is my imagination playing tricks on me?

Does anybody have an owner's manual for it?