Hi, I had a similar protocol three times a day with an exacerbation.
I went back to my doctor at at NJH and was told to use an aerobika with the ombra xl nebulizer system 2 x a day with only saline. 7%

So this accomplishes airway clearance and producing mucus in one step. The recommended going about 10-12 breaths through the aerobika system and then huff cough

This works really well and cuts down the time amazingly.

I included the picture. It also has the Mano ester so you can make sure you are not blowing too forcefully.

I also like it because it nebulizes on demand. The saline will only be activated when you are blowing in has a little button on top that shows you as well.