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CoreAS said..
With bolt systems there are all different lengths, they get loose, get lost, get grease, get sand, can sheer off especially with large front wings!
It's certainly true that bolt systems can be problematic. "Grease" and sand are a definite big problem if the brand suggests to use extremely sticky tefgel, and to disassemble often.
But it's a problem that can be solved with a little bit of engineering and knowledge about alloy chemistry - something Slingshot never did. I have used three different brands of foils over the last few years, and only Slingshot had frequent problems with screws (and under-engineered fuses breaking). No problems whatsoever with the two other brands. One uses more screws and stainless inserts, the other uses significantly larger screws, and a better engineered front wing connection. Interestingly, the amount of corrosion on that brand is
very low, even after leaving wings assembled for many weeks. Corrosion resistant can vary quite dramatically for different aluminum and titanium alloys, so it's likely that they picked more corrosion resistant alloys.
Under-dimensioned screws and parts will break - it's just a question of when. Replacing screws with a plastic part and dynema rope seems like a rather questionable solution. Another brand has tried a bunch of different solutions in their wave foil lines over the years, trying to cut a couple of minutes of assembly time by reducing screw counts through "clever" connections. Those had to be re-designed several times, creating incompatible parts in a few years in a row. The only thing this really was good for was to drive customers away.