BMH said:Centrifugal force. Tie a string to the end and spin it around. Make sure you are in a safe location as it will come flying out. Start it with a short string then add more till you get the right G force
neilc said:Do you have a screw holding screwdriver? Clamp the centrotec holder in a vise and use a screw holding screwdriver to clamp the screw with the groove. If you can turn the screw you might be able to pull it out. If not, the epoxy idea on a piece of dowel sounds like the only alternative before you drill it out or replace the centrotec holder