I followed the service manual as for 20lbs, 90 degree then 90 degree again on bolts 1-8. After I was done just to check I set my torque wrench to 30 lbs then 40 and so on, after 70 lbs I did 5lbs increments on the dial it finally "clicked" at 90 lbs on all screws (except the small ones off course which I set at 20 lbs). Isn't 90lbs too much? I did use an angle tool in the installation procedure.