I have recently switched from Ferebee heads to Caruthers waterfowl heads. I use foam necking with a smaller 1/4 piece for the esophagus. I am not exactly sure what the best method is to mate the foam necking to his heads is since he has a dished out area on his heads. Ideally, Matuska or Cory will hear about this thread and post some pics of the correct way to do this. I know to drill hole and hot glue, what I mean is how to trim the necking and get the CORRECT placement and flow for different poses and where to insert wire/drill hole. I know there are different neck positions on standing versus flying birds. I would also like to see these. If anyone out there would like to share their method with the same type head, feel free.