I use a large paper clip, held with a small pair of pliers, heated with a propane torch, inserted through the tapped side of the wheel. It takes some patience, but with a bit of practice the task becomes fairly easy. The wire will only be good for about two holes-as avery time you reheat it, it becomes softer. So have a good supply of paper clips on hand. You can also ca a small piece of brass tube on the end of your flat blade screwdriver to avoid the blade slipping . Hope this helps.
Ron Ballard