Agree as well but it feel softer than Dg and the distance is greater than NS.Pro I have try both K's 3001 R and S felx but I prefer S flex better . For me R flex give more kick +distance than NS Pro 950 R but on long iron difficult to control and ball flight is not as penetrating but S flex is better than NSPro 950 R but less stiff than NS pro S
That is my thought
I have put shimada ks 3001 stiff in miura and it is a bit stiffer (not much) than nspro 950 R as for the ks 3001r I have also put it in another miura cb 3002 although I prefer nspro 950 R better. But Distance wise Shimada is longer in Both flex when compare to Ns pro in both flex. Hope this help