If you think a high speed lathe makes the wife come unglued, wait till you see what happens when you make the motorized merry-go-round go super fast!
Sanding is ok, angles not so much, sanding inside the lines not nearly as much, and watch out for the crayon marks ...
Sharp tools are now dull ... check!
Amperage .... well, put em in a squirrel cage attached to a generator and I'll betcha you get some lights glowing occasionally!
Bad bearings are like bad genes ... they run in the family. Best to just swap out the wheels from the start, so you don't need to drain a bottle of castor oil every time they need to go...