How to Align Gunports Port & Starboard on a Solid Hull Model

[KAYA61]

I will report the results of the application in my build log.

 

[KAYA61]

Dear @Bob Cleek and @AllanKP69
I finally got the template...I'll apply it on the model tonight... (don't be fooled by the line below, it's not a waterway line.)
I am thank you very much again your help...