Woody, the 24h hand is ALWAYS automatically in sync with the hour hand on the real working GMT watches. You don't have to adjust... or CAN'T adjust the 24h hand on genuine Rolex (or the CHS) independently. This is purely a "Chinese invention" on the WHS. You can, however, set the GMT hand from the hack position, which moves hour, minute and GMT hands. So it's not necessary to adjust the hour and GMT hand at all... and still use the GMT function from the 24h bezel.
On the 1675 and 16750 nothing was independently adjustable. On those watches you always use the GMT function by rotating the 24h bezel. This is the best option for the fragile CHS.
I'm often amazed how few people actually know how the GMT watches operate... even some gen owners.
PS: I love the WHS bastardization. It's a fully working, cheap and reliable invention, as long as you know how to set it up correctly. Check this small tutorial I wrote.