[r-t] Out-of-course Surprise Minor

[Simon Humphrey]

Alexander Holroyd:
> 
> I've now had a chance to address the issue of arranging "plans" of true
> leads into extents.  (It is possible to use the exact cover algorithm for
> this phase as well, which makes it very fast to run).  In particular I
> have found all out-of-course extents that use only one type of single,
> where the single can be any one of the 4 possible treble-fixed single
> changes.
> 

Very interesting.
Are there any all-the-work 3-parts which include methods with different
backworks, i.e. not just differing at the lead-end?

SH