Hi Paul, I don't know from personal
experience, yet...
In the
video, the author states that they don't last forever, particularly since they crack as they dry, and those radial cracks weaken the head and then it breaks.
However, it was free, and nearly finished once you cut... and literally "grows on trees", so there's plenty more.
My thought on a smaller head was rather than make a commander/beetle/persuader from a large whorl, that you could begin by splitting it radially (like it will in time...) and get four or five smaller billets with decent size branches for handles.
There's always the option of using hoops or something near the faces, to reduce the chance of splitting, but that seems like gilding the lily.