Correct foot placement for shortboard?

I moved to a short board 8 yrs after starting longboarding.
Im a big guy at 6.3 and 210lbs and ride a 6.3
My popup is fine in one smooth quick motion.
My problem is my back foot lands just in front of the tail pad and hence in front of the two fins.Im natural.
Any ideas how i can get this back foot onto the pad directly on popup.I dont want to adjust when im up.
Also my front foot lands about an inch or two over the halfway point of the board.Maybe this is also too far forward.
Advice would be greatly appreciated
Thanks
Im a big guy at 6.3 and 210lbs and ride a 6.3
My popup is fine in one smooth quick motion.
My problem is my back foot lands just in front of the tail pad and hence in front of the two fins.Im natural.
Any ideas how i can get this back foot onto the pad directly on popup.I dont want to adjust when im up.
Also my front foot lands about an inch or two over the halfway point of the board.Maybe this is also too far forward.
Advice would be greatly appreciated
Thanks