Am about 70kg and was thinking of rigging an "07 6.5m Stealth on a 100% r.d.m. 400 with a 30cm tip-extension (instead of the recomended 430). It looks good dry rigged, and I like the idea of a bit of flex when a gust hits (also means only one mast for my 5.0, 5.5 and the 6.5 Stealths) What do you knowledgable ones think? Has anyone done something similar?