Stu!
Stu, no ill will intended, but I think you may have mis-spoke(something I do sometimes)about the length of the genoa sheets. The larger the foresail, the longer the sheets need to be. On a 150 genoa, the clew comes farther back behind the mast than the clew of a 110 jib. Each sheet needs to be long enough to go from the clew, around the mast, and back to the winches and cleats, with enough extra length to provide a good handhold. For someone sailing with multiple headsails that wants to use the same set of sheets, they should measure their largest headsail. It would be a very expensive mistake to buy sheets that are too short.