Know exactly sound you mean.
Last year rigging up a NP (brand new) on an x9 mast (brand new) mast broke before fully downloading.(perhaps half ension ?)
Made me wonder how on earth mast got through quality control.
a) Dealer was on beach helping rig ! (I was downhauling !)
b) Sail undamaged.
Got new mast immediately.Not sure what delaer did with broken one.(Sent to Greece it sounds like)
Rarely rig on x9 now !!!! Put sail on Tush 75%. Yep its probably not as good (x9 hardly used ;darent use it when there`s any chop)