The problem being that in spite of his several hundred footprint casts, the majority of his peers either think them hoaxes or human. The more parts he has, and I was specifically talking to him about bones, the less his peers can claim that BF does not exist. If he can produce a skull or femur that are significantly larger than human, it forces his peers to face the possibility of existence of BF or theorize that there are 9 or 10 foot primitive humans running about. While the deniers want him to be wrong, they are not likely to conjure up giants as an explanation.