Xura...sorry but I have some bad news....
in a way, you guys are victims of the boat you sail...itīs not you or the sails or the crew, is the boat..these boats are designed, as many so called cruiser/racers in the proiduction series, (and I am assuming the boat in question still has original keel, rudder and has not gone thru a "weight loss program" to race), to be sailed as coastal cruisers with friendly multiple rating races schedules against other same type boats, and not One design or box rule type races......this to say that the type of mast adjustments, keels, sail, CofG, CofE etc. are all designed to be sort of neutral to provide confort to a regular coastal sailor, as that boat is a fast cruiser, that can be raced...
Therefore, mast trim, shroud tension, mast bend, sail plan, keel weight, draft and shape etc. are all designed for a lower band wind speed, and somewhat limited in the range of adjustment...and to the assumption that the "average" sailor will reef, douse, furl etc. as the wind increases.
However, and in your case, if you feel you need more bend, there are several things you can do, even with the present sails, these include,
1) adjusting mast tension with a loos gauge, based on the winds before departure to the race, this is a thing where the more you do it and the more you become expereinced, the better you become at it..select only one person in the crew and only him should do it to avoid arguments..I do it myself, but I have a hydraulic jack under my mast, to do it on the go. The advantage is I adjust shroud tension based on the winds.
2) Preset intermediate inner shrouds to limit mast bend. You can ease some the inner shrouds to allow more belly in the mast. How to adjust..in a calm day hoist the main, so you can look at camber, tension the BS and release slightly the intermediate inner shrouds as you bend the mast backwards, with the BS..with this method the inners will be almost completely loose when mast is at rest..I have mine set like this..I provided maximal bend and the limit is set by the inners intermediate that tension at full BS tension..be carefull you need to know what youīre doing..
3) Check angle between genoa and main, and if needed open the gap between them, or close as needed, with the installation of barber haulers.
4) donīt be affraid to release some the main sheet until the portion of the sail along the mast actually cambers the other way, this will help even the boat, and it will actually accelerate. The cunningham plays an important role here..
I have a formula that allows you to measure maximal mast bend at the tip of the mast and how much belly you can induce, based on mast height, that I will provide to you by private pm, should you require so.
These will do for now, should you want to pursue this discussion further let me know..Jeffīs points are 100% right on..he knows main trim for sure.