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Old 23rd August 2010, 08:22 AM   #4
Join Date: Aug 2006
Location: Australia
Posts: 164

I have ridden both Futura and Super Sport, prefer the Futura. Have also ridden the S Type, and the Futura is a step up in allround performance, planes ealrier, goes upwind better, same or slightly better top end. Looking at the tail widths, the F122 would be a direct replacement for your ST137. In marginal 8.5 weather, just use a slightly bigger fin to overcome the lesser volume of the 122.
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