I will start by clarifying
"I will start by clarifying why I chose three stars. It is not because I think bad things, it's in the middle so my opinion is neither good nor bad but right down the middle. We are taught that you roll charts not fold them. Folding charts appears an obvious choice that is probably made for convenience and cost. However the reality is, it is a folded chart that is used for training and it has its shortcomings, specifically, a fold can effect a measurement. It may be small but it does in-fact have a possibility for effecting measurements. I have other thoughts but that is the first one that comes to mind and I'll stick to one."