In response to Catandahalf's claim, A-Class head widths to foot length ratios on current competitive A-Class mainsails are in the 44% - 52% range (850mm - 1000mm head widths and 1,850mm - 1,900mm foot lengths) so we are not providing the "stoke" for anyone designing a mainsail with a 75% head width to foot length ratio. Higher aspect mainsails have been tried with not much success. Remember we even had a solid wing rig tried in 2007 beautifully done by Ben Hall and it was not competitive upwind due to an increased pitching moment.