Box placement and board size

I have this 4’8 and 4’ prone board I’m building. Is it a good idea to move my 10" tracks back closer to the tail on shorter boards. I ride goifoil atm but getting sabfoil soon so how do they ride compared to gofoil which are very front footed, so kept futher back in the tracks. Started taking some measurements and put the start of the tracks at 10" from the tail on my 4’8 and moved that back 2" for the 4ft board.