My Flex 3401 has almost entirely replaced my use of my rotary. I still grab my rotary for headlights and "spot" corrections on paint but 95% of my correction and finishing work is done by my forced rotation DA Flex.
I will say that prior to my Flex I was working primarily with my rotary machine...both correcting and finishing. Rotaries work good and fast but the proper technique is obtained with experience and use.
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