If I remember correctly, most of the F16s at global challenge weighed around 112 KG. My blade rigged for 2 up was 111 KG. That is not far from min weight. I don't think a weight reduction of 4 KG would result in, at least for me, a noticeable performance increase. It is not a logical argument to use the viper's weight of 130 KG as the standard weigh of an F16, then make a general comment that an F16 that weighs 23 KG less would be faster and much expensive. You can spend all you want on prepreg, using an autoclave, carbon mast, carbon beams, ect. On most F16s you can only loose 4-5 KGs before you start having to add it back. Some are at min weight already. So the idea that the class will self destruct when someone builds a min weight boat is ridiculous. Most boats are pretty close to min weight already.