IMG 1724PaulK

Keeping the mast up is best way to start. Have you inspected everything? The rig turnbuckles are probably already close to where you want them. You will have to go sailing to find out what adjustments might be needed to keep it straight and in column. It looks like the backstay adjuster is quite powerful and that the mast is pretty bendy. Adjusting that will depend upon your sails and the wind strength.