How good is the Flex?

Flex speeds ?
Level 1: 160 RPM, 3,200 OPM
Level 2: 200 RPM, 4,000 OPM
Level 3: 270 RPM, 5,400 OPM
Level 4: 330 RPM, 6,600 OPM
Level 5: 400 RPM, 8,000 OPM
Level 6: 480 RPM, 9,600 OPM

I normally use level 3 or 4 for finishing, level 5 for correction
 
I probably wouldn't even think about upgrading from the PC to Flex if the KB method wasn't invented. I probably would have taken my chances with the rotary. Of course, I retain the right to sneak a rotary purchase past my wife somewhere down the road!:D
 
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