Titleist only sells assembled irons so you can buy individual completed irons to your specs or find some second-hand irons and have those shafts changed out at your local golf shop. The reason Titleist does not sell heads only is that they rely heavily on their high quality control to maintain their warranty program. Problems from poor installation resulting in club damage should not be their responsibility to support, something to remember when people get new irons and take them apart for custom ferrules or adjusting loft and lie.

Snap, would be good to know.

I'm also after the CB 620 heads, as I've got shafts ready to go. I've not got a swap as would be ideal john.