Hey,George T.
Hoodsie is pretty close on using his CS.
Keep it simple till you get your feel,it won't take long.
Stogie,who I'm glad to see back and he must be traveling too much, is right on with a fine universal technique.
I don't know your weight on the slabs,but it appears you have cooked some ribs.
If I am doing what many consider a babyback,20oz.-28oz. slabs,they are easy on the grill.
Stogie can give you great advice,there.
If I am doing loinbacks,about 2.25-2.5 lbs.slab, I have good results starting them meat down for 2.5 hrs.
3 or 4 oz. of wood will probably do the job.
Flip them ,spray them with apple juice,and open back up at 3.5 hrs.
Stogie will tell you to stick a toothpick between the ribs[which I like if I'm doing a few],Smokin' will say to bend the slab in the middle when you turn them,or I'll pull off the end bone[it will be too dry for presentation anyway] and see if it pulls to suit you.
I agree with Stogie about all that sugar.
If you don't use it ,get turbinado sugar-sugar in the raw,and substitute it till you get the results you want.
Pull it ,when that toothpick goes through easily,instantly paint on a little brown sugar or honey glaze and see where you are.
Next time you can adjust all to your personal tastes.
The CS compensates for many evils,uses less wood than you think, and turbinado sugar should help with the blackening.
Hope this helps a little.