detachable roller furling...
remember that roller furling units on trailerable sailboats are usually made with a one piece, flexible foil that is intregal with the forestay and is designed to be detached at the bottom, where the drum connects to the stemhead, so the mast can be lowered more easily. Some of these units, CDI for example, have an internal sail halyard built into the FOIL itself.You must determine the make of your furler, and the style of foil it uses. If the foil is a stiff, sectional tube you should be able to detach the SAIL from the drum and simply pull the sail down... after releasing the halyard of course. If you have what appears to be a single, one piece, flexible foil then look for an additional control line at the bottom of the sail's luff.