I have played many CG's so far, I like to pool the single CPP's , why you ask......I learned to treat them as a reserve especially if you do not know how many points you get each refit phase. Playing Festung Budapest many times the saved CPP were a blessing for the Axis side. I look at it this way, have a bad CG day, then if you have extra CPP's they can provide more troops or eqiuipment for a counterattack or to improve a defensive position.