I bought a new XLINE Evo-Lite brush and want to replace the pencil jets with 3mm ones, but I can't seem to remove the original jets from the Evo-Lite. I've tried using a Vise-Grip and also tapping the jet from the bristle side, but they won't budge, although they are turning with the Vise-Grip. Anyone any ideas on how the remove these little buggers?