Toggle Height With Field Perimeter

So I’m building our toggle mech (the toggle tongue as I call it) right now, does anyone know the total height of the bottom corner facing into the field of the toggle when it’s on the field perimeter so I have an idea of where to put my mech.

According to the GM, the height from the middle of the toggle to the field tiles is 13.20". So the distance from the tiles to bottom corner is probably something like 12.5"-13"