I’m interested to find out at what shaft length increase does Mizuno now move to the lighter weight iron head. Used to be at 1/2 inch long. Does that still apply now the JPX 919 series are quarter of an inch longer than previous Mizuno irons? I’d expect a JPX 919 to still be in standard head if 1/4 inch lengthened, which in old money is the same length as 1/2 long where the lighter head was used in custom fit.