Zinjo, you're just as right as NB4M. It's an equation with an X & a Y and NB4M addressed X and you addressed Y. If it costs only a bit more to make then you don't have to sell as many, if it costs a bunch more to make you have to sell a ton. Both costs and the number you can sell are pretty important. In this case, NB4M has stated that the cost to make should be minimal so the cost of the very minor retooling could be covered even if only a "few" sold. If it would be a cheap alteration then Yamato's problem more lies in guessing demand and producing the correct quantity. So, if it'd take 1K in sales to cover cost but Yamato makes 5K and only 1K sell then Yamato has costs covered except for the additional cost from the production of 4k in unsold units. So the real question here is how good is Yamato at guessing demand and how much drive do they have to make this variant (if NB4M is right and the cost would be minimal).