Although we had some super-secondary matches in the template library,
we had to rely heavily on our "new-fold" cost functions for building
models for target T0281.  We ended up with several slightly different
models that we have difficulty choosing among.

This is try24-opt2, which has three strands, with the N-terminus
almost forming another parallel strand with the first edge strand.  It
scores best with our unconstrained cost function without having been
extensively optimized.  It is also the most compatible of our models
with the contact predictions made (though the contact predictions were
not strong enough to drive the model building).

One feature that bothers us a little is that the initial,
almost-formed, parallel connection is an S-twisted (left-handed)
crossover, instead of the more common Z-twisted (right-handed)
crossover.