Bought my lad an MP 20 HMB 2 iron but with a Project X 6.0 steel shaft. Would like to get a graphite shaft without breaking the bank (in case that still doesn't work). He had previously hit a Titleist U505 with a Hazrdus Black Smoke RDX Hybrid shaft in and that seemed to suit. So's I don't start buying demo etc shafts that don't fit, it seems that the smoke, and a number of other hybrid graphite shafts are 0.370 tip diameter. I'm guessing that the HMB will be taper 0.355 and so many hybrid demo offerings won't fit once the hybrid adapter is removed. Any thoughts appreciated.