Jib controls. UPWIND If your jib is baggy, tighten the luff/halyard until a crease forms down the front of the sail, then let it off a couple of inches.
Experiment with the jib travellers cars, if you pull the cars back it will stretch the foot of the sail. If sail shudders when beating tighten the leech line at the back of the sail. This might cause a hook in the leach, but it will stop the shudder. When sailing close to the
wind sheet in tight till the jib almost touches the diamond wires if you have them.
OFF THE WIND
A baggy jib is good as it makes more
power off the wind, not too baggy though. Ease the
halyard a few more inches, ease the sheet out. For dead down wind use another line (spinnaker sheet if you have one) from the rear or middle
mooring cleat or pulley and attach to the jib clew and use this as the control sheet, let the normal jib
sheets go slack. A heavy duty snatch block on a
dyneema tether is a handy way of repositioning and redirecting sheeting angles.
Boom vang, don't know the
Leopard 44 set up but I imagine it is to stop the boom hitting the
cabin top or maintaining the right angle for a
furling mainsail. Catamarans tend to use the mainsheet traveller rather than the vang (most with slab reefing don't have a vang and rely on topping
lift to keep the boom off the
cabin top) to stop boom skying. Tension should be kept on the mainsheet and the traveller used to let the sail out, this will lessen the impact of the battens chaffing the sail on the side stays. It may not be perfect downwind trim but will save a few dollars in sail
repairs. With the twin main sheet system to act like a traveller I would ease the windward sheet completely and crank down on the leeward, this will bring the boom over the leeward quarter, tighten the leeward sheet until there is some tension on the leech of the sail and minimal batten rub on the side stays.
My two bobs worth, not ever having sailed a 44, but a 38 and a 39. With this mainsheet system for up wind I would ease the leeward sheet and crank in the windward sheet till the boom was over the centre line or even a foot to windward. Crank down on the main
halyard to flatten the
mainsail. Pull the foot out tight. Install tell tales on the leech of the mainsail at the top 3 battens. When tell tales on the tightened jib are flying horizontal, haul in the main till the leech tell tales stall and then ease off till they flow.
Forgive me if you are a seasoned sailor and know all this stuff already.