fix

try this..wrap tape around the flutes..say 2 inches back..wrap it straight.now put your thumb at the end of tape.twist and roll the bit..now flip it and grab the tape on the other side...right at the same tape end...keeps the flutes square to each other...twist and roll.
and keep your feet planted..think of yourself as a machine.flowing motion.

Shapers are fine tools.i love the sound of raw power moving metal.set it up right and 3/8 can be nawded off.let it have its way while you get busy doing other stuff.

if you please..CNC guys/gals are a dime a dozen..old skool hands on machinists are in demand big time. CNC is machine monkey work IMHO.but then some prefer that kinda stuff.
"the President him self would grind to a halt..if not for a machinist"

updated my profile..TY
and would scooter building fit as metal art? heres my latest dream.
hand made frame.and tons of other stuff.

lighten?//??? we still trying make stuff happen.cranking bars and slammin hammers.

been eyeballing you guys work..most excellent stuff.
im a machinist by trade (40 years now).but have taken the plunge into metal art.actually my boss's son got me hooked.he's been at for a few years now.
heres a link to some of the stuff we been making..hope you enjoy as much as we do.
Tyler Dominey Metal Art Sculpture Brunswick, Georgia

thanks..and watch them sore fingers Paul