If you are sharing things it still costs you money at some point and the time. Also, your set-up isn't mine. I've read of too many people having problems with thefull sized heads at higher speeds. Why do you think Muyzzy developed the shorter one in the first place? Because there was an issue that needed to be addressed

If it works for your father with the old heads I'm glad for him. Good Luck this fall. And, that dog is adorable.