Setting and handling should be practiced
Globally operating rig and furling system manufacturers have equipped their mainsail reefing systems with extra stay rails to accommodate the trysail. The sail is then set with the Dirk, which should be designed accordingly in advance. Basically, the trysail is run without a boom, which would only be an additional danger when furling in heavy seas anyway. For this, however, the sail needs sheets on both sides, which must be pulled tight after each tack in difficult conditions. The trysail must be adapted in its details to the conditions on board, and this applies especially to problem-free setting and handling.
Source: Sailor Newspaper