Got my 1617evspk today. looks like a terrific machine. I have not run it yet. It comes with a .50" collet installed. my first use will be with a .25" shaft. So I removed the half and put the quarter in and tightened the nut before putting in the bit. I tightened too much and now the nut comes off but the collet is stuck in the shaft. How an I get the collet out of the shaft?