Im not certain this is the last time this will go on or off but I did mount it up and torque the bolts. This install includes a saber 2-1/4" prop spacer and a 3/8" crush plate with 7/16x6" prop bolts. Prop calls for 35 ft-lbs. I torqued to about 33 and will put the final couple lbs. in just before I safety wire the prop bolts.