I go through this dilema all the time,to the disgust of SDR
my last board is the best example. I wanted it to be 6'x23 x 3. The del went to the computer and it came up with 6''6 x 22 x 2 3/4 with super refined rails.
i questioned him if that is right and he laughed. (SDR has not made a bad board yet for me) so i went along with it.
i got home and thought if it was thicker it would do this,and wider it would do that.
So my doubts were more that my dims were not being used.
Got the board and it is still blowing me away at how fun it is across way more conditions that i wanted it for.
moral of the story.
1 i should not worry
2 im lucky i dont make SDr do what i say,as i would have a shed full of dogs
3 its good to give honest feed back about your ability and your shaper will do the right thing
4 new boards always get me exited
5 thinking of my next board always gets me excited
6 dont listen to the experts in carparks or the internet