i know nothing about Loft sails - as we are in N. America
however, even though I have seen discussion about LOFT having long RDM masts, I have always been against that
in sails over 7 meter squared
so, i looked up the Loft Raceboard 9.5 and found this :
http://www.loftsails.com/windsurfing/products/sails/raceboardbladeALL the sails seem to recommend SDM and even 530 as opposed to 520 !!
looks like an amazing light wind sail !!!