What is the weighting on your KK iron shafts Icey? I remember swinging them in Myrtle and while launching them high, found them to be very stable.
Same goes for the Miyazaki iron shafts. Stable. Not crazy shuddery or flimsy at all.
The KK Blacks are 75. They feel very stable, but at times I wonder if they are just a bit too light. The AMP Cell head's actually helped me in that regard, their forgiveness helped my dispersion for sure.
You hit the nail right on the head though, as long as the graphite shaft feels stable the performance, at least for me, was off the charts compared to steel.