What's the weight? They look heavy? You going to do more lightening? 350hp what? ...I hope a lot more than that. Hell the stock rods will take that much.
A natural aspirated engine won't ever slip with a lock up. The arms are fully applied by 5500 rpms so the engine isn't into its power to slip the clutch.
It is the same as stock (only uses 1 spring). A double d is good to about 225 hp then it slips the lock up extends that to about 350hp then starts to slip. I doubled the weight on all the arms to 13 grams (comes with 6.5 grams).
Just take the last fiber out and slide the lockup back on and measure the gap. Gap has to be less than the last frition. It will hit the 3 rivets on the inner hub and not apply pressure if the stack isn't tall enough.
I put on a new pick up screen, had black plastic in it. Probably timing chain guide.
It's a bitch to remove the pick up screen. I put on a new screen because i couldn't get it apart with out destroying it. And the screen and mount was super cheap.