NECA Biff Tannen
These are the 2-up wax originals with the resin prototypes at the bottom.
Trev
Love the hair and teeth.
Thanks so much! Biff was really tough....It's hard to capture the comic quality to his intimidating presence. I really want to sculpt him in the various old-age make-ups from the movies. 
Hopefully the BTTF toys will sell well enough to warrant it.
Nice! I knew exactly who it was before I even saw the title!
That's great to hear, thanks!
Thanks, man!!
Thanks so much! I've had a ball on the BTTF stuff....Likenesses never get boring, it's always weird how persistently challenging they are.... I'm with you, I like the enraged Biff expression best. That was a fun one!
Thanks so much!
Oh man I recognized him immediately! Was just watching those movies this past weekend!
That's great to hear, thanks! They're still some of the best movies.
Thanks very much!
Thanks! I love seeing NECA do this line of toys, as it's something I've wanted for a long time. Grateful to be part of it.
It's shocking to me how many licenses they do get...Way more than I was ever used to getting to work on in my early days as a sculptor...It's helped make my day-job a lot more fun, never knowing what character I may get to work on next. 
That's really great to hear. Thanks! I'm glad the characters are recognizable, it's always the goal, but it's a very subjective thing.