Call Goodson at 1800 533 8010 to oder part number CF10 for $43.99. it will fit in a 1/2 chuck drill press if you have access to one and what I do is slide a board under the head so I can tilt it to get the right angle then use the above spring compressor adapter to compress the springs. I will already have the locks sitting in the retainer and when I compress the spring just use a little non-magnetic pick to guide them in place. The job will still take a good amount of time though. Plan on at least an hour your first head. Oh yeah, I also use the socket and mallet method to remove the locks and have never had a problem with a bent or nicked valve. Just watch where the locks fly!