Questions head fix

hello everyone have a problem...ordered a couple of custom heads went to dremel them out and made them to wide how can I fix them so they still fit on the necks any ideas will be helpful thanks

Hot glue in the hole. Wet the neck post, stick it in. Wait a minute and voila.

Use the hot glue method. Use vasoline on the neck post to keep the hot glue from sticking. Next, fill the head with hot glue and place the head on the neck post at the desired height. Once the hot glue cools, pop the head off and remove the excess glue and wipe away the vasoline. Pop the head back on and you're all set.

After putting the head on the post, I kind of slowly rotate the head downward. You just have to be careful when rotating or it will enlarge the hole and you'll have to start all over.

I use greenstuff instead of hot glue.