With the adjustable adapter, the sleeve has the 1234 and the ring has the ABCD.
With a precision micrometer I measured the "peaks" and "valleys" on the sleeve, for each of the four numbers, to the end of the adapter where it meets the ferrule. To the nearest hundredth of a millimeter, all four readings are the same for 1234.
On the ring, I measured "peak-to-valley" for each letter as well as the spaces in between. To the nearest hundredth of a millimeter, all eight readings are the same for ABCD.
I also measured the depth of the four "notches" on the hosel, with all readings the same.
If these measurements are the same, how is the lie and loft of the head changed with different adapter settings? Because if my measurements are correct, the head position relative to the shaft is the same in all sixteen setting combinations.
The only thing I can think of if there is dimensional variations, out to the thousandth of a millimeter, which requires a digital micrometer to read that degree of accuracy. Even so, will 0.001mm affect the head position? One bad swing or over-flexing the shaft will mask that dimensional variation.