I'm not sure I agree that the Scat crank is stronger than a stock 360 crank,there are other things to consider than the fillet radius when figuring the strength of a crank. That said the last Scat cast 4" crank I ran lived 8 years and lots of passes before it broke in 3pcs and made a big mess. I've run stock 360 cranks many more laps at higher rpms and not seen many failures.