Is it possible to re-orient chains in a pentameric way after using one of
those chains as template to build others?
This is so similar to the post you just sent to CCL that I'll duplicate
my answer to that post here ;)
Why don't you just combine steps 1 and 2 into a single step? Modeller
can build models using multiple templates, and will sort out the
orientation for you. So your alignment would look something like: