The last three parts are the same, which aids the conductor. There are no more than 4 bobs in a row, apart from one run of 9. This is of great musical benefit, as it avoids the monotony of the same pair of bells dodging behind for long periods. The average number of bobs per run is less than 2, which is lower than for any twin-bob composition. Bells quite often go up to the back and are unaffected by the bobs before returning, which is preferable to having so many bobs that bells are always affected when behind.
Easier compositions tend to be made up of identical parts with part-ends as members of a group.
A group is a set of transformations of the order of bells such that if any two transformations are combined the result is also in the set. The simplest group is the cyclic group, for example the rotations of rounds on 5 which is equivalent to rotations of a pentagon. Brian Price has been using various groups for Stedman compositions for some years, and Hudson's 60 courses are a group. I investigated cyclic groups of order 5 or 7, and found several touches, but none long enough to divide the extent into 5 or 7 blocks. I also investigated D5, which was much easier to search as it divides the extent into 10 shorter blocks, of only 504 changes.