Sorry, I wrote that in a confusing way. To do things in the order presented in the plans, back riveting seems mandatory. I prefer not to back rivet if I can help it, especially with AD4 rivets. Good thing I learned that lesson on something you won’t see if you’re not looking for it.
Putting things on the plane and then riveting them from the front would be my preference. But if there is a reason to rivet these things together off the plane, I will do that instead.