Blended rails and railbands

Hi, How do you put in the railbands when you do a blended rail(I don’t know if this is the right terminology), say a soft round rail up front to something with a tuck edge through the mid section to a hard, down rail near the tail? Do you still put in all the rail bands the full length of the board or do you work sections of the rail at the time? Curve the railbands or just do all the changes with the depth adjustment? regards, Håvard