I have an old HPI Pioneer milling chuck that I inherited when I got my machine. The issue is I cannot twist the chuck to release the collet. I'm trying to rebuild and lubricate the roller bearings. Has anybody experienced this issue? If so, do you have any tips on releasing the chuck? I've put the tool holder in the tightening fixture and banged on it with a mallet, sprayed some PB Blaster in it, put it in the freezer. I haven't had any luck in budging it.