I wouldn't release the jib sheet so soon.



Sail close to the wind,



Let the jib backwind first, ease the main, then reverse the rudders, so the boat pivots around, almost backing up. This will get you thru the tack even in heavy seas and air. When it's thru the tack, cross the jib, and start hardening up on the main.



This will get you thru the tack EVERY time.