Longboard fin box screw up

Possibly just screwed up the Noserider I am finishing up.  Whether I mis measured mis marked or whatever, I just installed my fin box 6-1/4" from the tail.  My greenough stage 6 is about 2-1/2" from flush with the tail… Question is, should I route out this box and start fresh or will my placement still work?  Maybe a bigger fin out there with more rake?  Any suggestions…

I know some guys put the box way back for ultimate nose rideing,

like 4 or 5 up

but 6 will work

why cut it out without testing?

Good point.  I think I will give it a go and see what happens