the pre-load is enough on my output shaft that i can't free wheel the companion flange. In other words I can't take my hand and throw or spin it fast to have it moving freely on it's own. It stops a soon as I let go. 1.08 to 1.78 is not a lot of force or tension.
it is not, but you haven't got 1.08 foot pounds of torque on that stack. you're closer to 5/8'#...the companion flange shouldn't freewheel at all, so none of that indicates anything undesirable.