The Wind can get rather heavy in the late afternoon outside in LB.
How far can you heel over ? - until 'green' water is flowing over the gunwhales
How far should you heel over for speed ? - Heeling modern boats beyond 10-20 degrees produces a sensation of speed, but all you are doing is moving sideways faster.
Ease the main in puffs, tighten in lulls - it is called "working the main".
Have fun - and keep us posted !