I wanted to change the chuck to a keyless type, the Sealey blurb on the press says "Keyless Chuck GDMX/KC" , this has a JT3 taper, the original chuck has a B16 taper so the replacement will not fit on the Arbor, so if you want to do this you need an MT2 : JT3 tang Arbor. Still waiting for Sealey to come back to me with the above information, which obviously I found for myself.
Mike