Kami said..
As i can remenber , in a last swung the front outside corner rail bite and i fall over and around with the lip.
Ah, happened also quite often on my 6'10" Simmons, even with a semi-pointed nose.
My solution has been to put the fins as far back as possible (so my rear foot could be as far back as possible) and use C-Drive that can release excess pressure via their thin tip. With keels the inside tail rail was "foiling up" and the outside front rail would catch.
So try to use fins with a small head area, as far back as possible.
The position is on the board on the left: