Clutch grinding

After taking the tranny out 3 times.
I finally called Zoom and they said either the flywheel is machined at an angle, the disk is warped or there is something wrong with the pressure plate.
They said to send it back to the vendor for a replacement, which I did.
Ordered a centerforce dual friction with a new centerforce flywheel.
Bolted everything in, removed the over-center spring and started it up.
It goes right in gear and shifts smooth.

I did notice that the clutch wants to let out at about 3/4 of the way up the petal, is this normal for a centerforce clutch? I played with the adjustment a little bit but it seemed to make no difference.