i agree with the clutch mine slipped with 7 psi too
My clutch slips at 4 psi , replacing it tommorow 
XTD clutches ftw
Oh and if your getting a 6 puck lke I did I hope you like a nice annoying squel cause thats what you’ll get going into 1st almost everytime. Other than that the shits grabs and the pedal is as soft as stock.
That doesn’t strengthen them as much as you think. I’ve had several sets balanced and shot peened.