C-12 Jake question

I have a 2004 mbl c-12 in a w900b daycab. It always idled a little rough so I finally pulled the jakes and copied all the injector trim codes and got them set. I adjusted the injectors and valves since I was there. It now idles smooth. When I put the jakes back on I found conflicting information on the lash setting. I have always run them at. 045 I found something that said mbl should be .055 . I set them at .055 and I don't have the engine braking that I used to. So my question is can I run the .045 setting? Or was that possibly part of my rough idle.

 

Thanks. All six trim codes were wrong. Runs much better now.