Station 11-12 where swapped for station 13-14 during 2018-2019 shutdown. Once lock out and motor disconnect was complete we commenced removal of spares and installation of original equipment. Station 13 was swapped in for station 3 and the upper bearing was serviced.  In addition to regular maintenance we built and installed a cover for the void in between station 10-11, this void in shielding measured approx 2'x4'. RH borrowed a demo Milwaukee 1' cordless impact from Motion industries. Our goal in trying this tool was to compare break out force between it and a pneumatic 1' impact in the hopes of removing all pneumatic tooling from our elevating system work. We tried it against a number of bolts and found it comparable with a 75% weight savings. In the past number of years we have made investments in tooling, equipment and safety gear in the drive to remove hazards and mitigate risks.