When the leeward chain plate is just above the water you are overpowered. The mast chocking system must work easily for adjustment. Good jib choice and constant trimming are fast. These boats sail well deep. Middle man must work hard at kite trim and give constant remarks back to helmsman about pressure and ease of trimming.
Front man looks at the big picture.
There are static set ups that you can work with. Learn to use your lowers more. Tops boats are constantly changing lower shroud tension between upwind legs. Remember 50 tiny improvements make a small difference to boatspeed so when you optimize your boat this winter be realistic about what you want to achieve next season. For the Etchells Qualifiers and Worlds this year, set yourself a target position within your capabilities when you are sailing at your best.