Well i can share what we do to get the copper out,To start we take the copper houseing and cut the first half of the exposed copper off useing a band sawTip cut the side off that does not have the wire inserted in it, cut the most uniform side.Then we place the housing in a vise,tip we spray the copper winding with WD or a degreaser,leaveing the wide wineding on form the cut stage now gives you some more leverage,useing a seal puller sold in sears and napa the remaning copper can be pulled out pretty easialy.
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