Protein Modeling
3.c. Part II: The On-Site Model (10/18/11): the pdb for Regionals should read 1i3o.pdb (the letter "o", and not the number zero).

Towers B/C
(10/17/11): Add one line, "6.c.iv. The tower height is measured to the highest tower point on which the bottom of the loading block rests."