I ran a RockSim and it came out to 1,400 feet. I entered a 7 second delay not a 10 like you mentioned because the 10 just causes a late deployment, no extra altitude.
D'oh! If you need to trade for a shorter delay, let me know. I think I might have a -7 in my box. I know for sure I have -4's although those might be too short. Shoot, if it means we get to see more composites burn, I'll be certain to make you a trade!