Originally Posted by sailingdog
Besides, you really wouldn't want to do that IMHO. A good 140% genny designed for light air is going to be made of cloth too light to really survive heavy winds with the sail reefed down 50% without stretching out the cloth.
Yep, that is the real problem. By the time you are in wind conditions requiring a 30%+ roller reef to your headsail, you really need to be going to a heavier weight sail.
If you are trying to minimize your sail inventory, my suggestion would be to go with a 125-130% genoa that can be effectively reduced by 25-30%, and add a max-sized staysail of heavier weight material that can also be roller reefed. That should get you up to the point where you're thinking about bending on stormsails. Of course, the advice depends somewhat on where/how you plan to sail.