I can’t even wrap my head around the question if this is a good deal or not.
Take the Callaway FT-i. Pay $500 for the club with shaft.
or pay $400 for the head, and $150 for the shaft.
then buy additional shafts at $150 or more.
Maybe if you are going to use a couple different shafts, this might make sense.
Lets say you have a high lanuch and low launch shaft, or a couple different flexes- and then you buy a new i-Mix head when it comes out in a year or two—then it might make a lot of sense.
For me, it is just too much money. I have a $150 Callaway Big Bertha 454, and a $199 Callaway x-460, with two angles, one weighted (with tape) for draw, and with a shaft for high launch and one for low launch. But this is 3 years of drivers for me. And instead of trading next time, I will get a another driver and just switch between them.
For me, it probably works better psychologically to have 2,3, or 4 drivers to switch between instead of trying to find some sweet combination of perfection with the i-Mix system.