My Freud router comes with both 1/2" and 1/4" collets, which snap into a collet nut. I cannot seem to get the 1/2" collet out of the nut. I understand it is somehow supposed to snap out, but cannot figure out how to do this. I've searched old threads and the WWW without joy. The manual is little help - I'm hoping SMC'ers can provide some assistance. Thanks.