I have no exact figures for you but here is roughly what I did:
I took the tops off the carbs and rested them on the bench up side down with floats in the air - Then I adjusted the small tab so both floats "just" rested on the Ball valve, Kinda hard to explain but get them so the floats just rest on the ball valves and still have a little "spring" to them

As for how deep the Floats go - I don't have a figure for you but I just measured the depth of the float bowl and then adjusted the other tab on the floats acorrdingly - Hope you get what I mean

Ask me if there is anything you don't understand and I will "try" my best to explain further
