See https://doi.org/10.1117/1.2031216 https://doi.org/10.1117/1.2031216 for the scaling of cost with size. It is very much not linear. Rather if you double the

See https://doi.org/10.1117/1.2031216 https://doi.org/10.1117/1.2031216 for the scaling of cost with size. It is very much not linear. Rather if you double the diameter the cost goes up by about a factor of 3.5 (closer to the area that went up by 4).