Out of the box mods for my Electrolux LE.
I added some sound deadening pads to my LE along with a ceramic bearing.
I think the upgrades were worth it. Without the pads, the sound resonates in the plastic canister.
I carefully applied some pads under the motor and some above it.
For the bearing, I decided to try a hybrid sealed ceramic bearing since the prices have come down substantially.
The benefits for ceramic bearings are numerous, and should last a long time. The race is metal, the bearings are silicon nitride.
I also added pads to my PN-6 power nozzle as well. Found a method to refurbish the small wheels on it as well.