..been working in industrial maintenance for over 20 years...
..kinda get a feel for torquing fasteners and such...
..these aluminum casings will not withstand ANY hard torque...
..the drive shaft nut is considered a stretch threaded nut..not to be torqued repeatedly...so, when you re-assemble, use a small bit of blue "lock-tite" threadlocker on the inner threads of the nut..
..don't need more than a glazing..
..but it's that extra bit of reassurance that counts...