I have emailed with Xavier at OcCre in the past and he has kindly responded that he is not in charge of the technical department but passed on my notes to the technical department.
Just as an FYI OcCre responded that they are aware of the difference of the deck (and gun port) sheer being different than the planking but thought a "few" mm would not be noticed. As there is as much as 7mm difference at their scale of 1:87, some might disagree but as Crypton posted, accuracy is not always the most important thing for everyone. Number one is have fun.
Allan