Sail trim
1. the 33.5 is -relatively to other Hunters- fast and quick to heel ,with it's high mast and shallow wing keel, but one can deal with that by correct trim of the sails.Basically , you should be able to keep the boat 'on feet'(15 % or less heeling angle) with double reef main and 50% rooled genoa in 20-25 kts.Make shure :a. you have the sail flattened (tighten outhaule, hylard and reefing line)b. you have the correct mast bent and rake ; too stright mast prevents the upper part of mainsail to 'twist' and spill the excess wind, and may cause heeling.c. mainsail might be 'overused'or 'blownout',( if regulary overtighten,or raced and 8-10 years old..) and the shape distorted ; it is so, altough you tighten all ropes the sail 1.remains too full , and 2.the deepest point of camber is more than 50% (of sail width) from the luff.d. have the traveller downwind all the way and tighten the boom-vang; doing so will correctly flattened the sail and avoid luffing-and excesive heeling.e.Do you have any significant weight added high above cabin floor level?( radar radom high on mast ,liferaft om railings,etc. or add-on in mast furling in front of the mast)All these add to heel angle on this kind of boat , and ultimatelly has a negative impact on stability curve. If you encounter winds of 25-30 kts at times , I suggest having a third reef added to the main. More 'racing'oriented 33.5 owners might give you additional specific sugestions.