I can relate to the whole "focusing on product" thing...This is the main reason we dont cut grade lumber...too many different piles of lumber lying around.
We will cut just about anything to order but, we have one main product that we produce when we are not filling personal orders.
I think this also helps with cash flow, when you are dealing with tractor trailer loads, It takes a long time to get loads together when they are going in two or three different directions.