You just might change your mind when those 4 little 4mm screws shear and the prop comes off...
There would be no questions about how to get sheared bolts out of prop hubs if all engines had singel bolt prop hubs....Our 210cc race twin prop is held on with ONE 3/8-24 grade 8 bolt in the center and uses 2 small studs 180 degrees apart through the spinner backplate and partly into the prop itself...Has never slipped....
Wonder what the G load is on a 31 pitch prop turning 9000 rpm on a plane making 180 degree turns every 5 seconds ?