If you race the main thing is to use one that is shaped like a foil (Harken). If the extrusion is round it will not sag like a foil shaped extrusion. All of then do not sag as well as a regular foil but the Harken is a nice compromise.
David Bows Mallorca - Hull# 397 ~~~~~_/)~_/)~~~~_/)~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~