I have been using a 150 rotex and a 150 3mm ets sander for about 7yrs and I love em......but I sand floors for a living so they get put through their paces daily the sanders can handle it but we keep burning out the leads! iv sent them back and they are ok for a month or so then one of the little connection holes melts and it starts cutting out iv burnt out loads of em. I got a new ets and it stated melting leads after 8months. im about to try the mirka deros but can itcompare with festool?