What is the best way to install different propellers for the E600?  I am looking to swap on 10in and 14in graupner propellers.

Very carefullly!  Check your motor chart for torque/efficiency vs. voltage.  Generally, larger prop requires lower battery voltage (2s-3s) and smaller diameter props require higher voltage (4s-6s) to stay in the most efficient range (longest flight time).

xswamix Posted at 2014-12-21 06:04
Very carefullly!  Check your motor chart for torque/efficiency vs. voltage.  Generally, larger prop  ...

The 3508 motor are actually made to handle 14in props at 6s and still run quite effectively.  The original F450 motors are not made for larger propeller so you need to reduce voltage to reduce the possible MAX RPM.