Borg and Beck type clutch with hydraulic throwout bearing?

I have an american powertrain HTB.
I put my system together with my B&B pressure plate.
I had a 3100 lb PP and the pressure to push my clutch in was too hard.
I called A.P. and the tech said, oh no, no B&B could be used.
He said if you pushed the bearing past the 3 fingers it would be bad.
I have no idea how you could go through the fingers/levers but that was what was told to me.
I changed to a McLeod diaphrapm and the pressure was MUCH better.
And I have been to the track twice and the system is working great.
My experience.