Deep Tuttle fin box question

[johnk]

Hi Roger,

I have Deep Tuttle fins for my board and noticed when I tighten the bolts that the root sinks down below the surface (approx. 1/8"). The fin feels securely in place and the bolts get tight however, the root is not perfectly flush with the bottom of the board. I have observed this with two different fins on this board.

Does this have any impact on the board's performance and should I try to modify the fit? If so, is it better to modify the fins or the fin box and do you have suggestions for this?

Thanks in advance,
John