Remember on the gen hands, the sub hands don't fit - if I remember you need to slightly broach them and the sweep in too big so a pinch is in order.
The exact measurements are posted somewhere in the Omega area.
I just finished a swap to a Swiss 7750 with hands, date wheel, etc. The A7750 went into a Junghans chrono.
You'll love those gen hands as they are the correct length. You've got a super project under way!!
Jim