ProLimit for a reasonable quality entry level boom.
Try and find a NOrthXT extension for downhauling Boxers , they set all on downhaul with 2 fingers pull of outhaul.
They are different type of sail than you used to use , almost square in shape with the top 1/3 designed to deflect and twist off , allow the power to vent and decrease in the gusts. Good idea to go RDM , they sit and rotate better on thinner masts. They do rig on SDM , but not as smooth rotations , at least that is what i have found with mine ( 5.8 )
JP FSW 84 is a nice little board , guess its Yellow and white with a pointy nose ? You might want to look for a 90 - 95L FSW board to complement it . That way you can wobble out to waves in 15+knots , pump like mad and get a ride in if its clean and lighter winds . Unless you weigh 11st , then you might get away with the 84L
