Blade Ganging

[needforspeed]

I never put know more then 1 blade under the spindle, when you add another blade do you have anytrouble keeping the life of the spindle bearings?what is the best configuration on doing this, using 2 high lifts? a high or a low? high on bottom low on top? do you need to pin the 2 together so they won't slip? does it improve the cut?
needforspeed

[lawnman_scott]

Just put them on in an X, and they will help to mulch up leaves and clippings better.