I calculated that everything would need to be 72.2% of the original dimensions (13/18=.72222). If I build everything to that dimension, can I also assume that the CP will be 72.22% of the original? Will this get me close?

The original CP is approximately 10.7 (from EMRR) and if I calculate it at 72.22% it would be 7.73. Am I making a reasonable assumption?

We all know what ASSUME means!

Thanks