i sailed this 08' 6.0 mtr. sail twice but am wary about the mast cuz i use the old NP matrix with yellow insignia am guessing 60% carbon content max. would this mast suffice the required 75% and newer masts? i noticed as i downhaul a ft. at a time the cams at the bottom get tighter and tighter that i make sure the cams don't come flying off however they pop nicely at both tacks and am thinking maybe the newer masts are a tad smaller in diameter...any suggestions
If the cams are rotating fine then the mast diameter is fine, most are a standard diameter apart from the dropshapes or rdms.
Cams will never come flying off as they get tighter, the direct opposite occurs.
60 vs 75% you won't tell the difference.
Just go and sail 
Np mast up a gasstra sail?
they are exact opposites of what they need.
If theres issues with anything its cos of that.
i used the same mast in an 06 gtx & it worked fine.
the bend curve changed in 06 on gaastra from hard top masts to more of a constant curve / slightly flex top masts. check www.peterman.dk/masts-all-imcs01.htm , like you i found the mast was quite a tight fit in the luff pocket, but worked fine.
thanks guys that's what i needed..i downhauled to exact specs and seems very stable at mid to hiwind and works fine in gusts
