body sprays: 1/2" or 3/4" loop?

We are in process of remodeling the master bath. In the new shower we'll have a hand shower, shower head and two body sprays -- each will have a separate volume control (the body sprays will share a volume control). There is 3/4" supply and we'll have a 3/4" thermostatic mixing valve.

I understand that the hand shower and shower head should each have a 1/2" supply. What I'm receiving conflicting advice about is running supply to the body sprays. Should they be on a 3/4" loop or a 1/2" loop?

thanks

Tom,
I've done many of these,

The loop should be 1/2". Make sure to use 1/2" tap tees ( 1/2" c x 1/2" c x 1/2"fip ) and that the depth in the wall will allow for 1/2" brass nipples to attach the body sprays to.

They work GREAT !