"LOFT SAILS - 2012 BLADE RB 9.5 AND 8.5 - The spanish, Tarifa based, Loft Sails tells that the
2012 Blade RB is the lightest RB to date. The orange top material is 2 millimeter thick, the foot and leech material is 2 millimeter kevlar, with only 5 battens the 2012 Blade RB 9.5 weighs 5.4 kg.
Compared to our RB 2011, The Loft Blade RB 2012 is a step towards optimized light and medium wind performance; more generous body shape and firmer leech. Its upper end is comparable with the 2011 Blade RB, with the low end significantly extended. As always, trim is critical, as well the mast stiffness and flex distribution.
Regarding the Blade RB, an sdm mast is likely to add to your efficiency upwind, and general acceleration, and it may prove better in the low end.
Blade RBs include Tekcams for both RDM and SDM masts. For our Blade RB designs (specialized for long raceboards with centerboards) it is likely that SDM will offer the best competitive rig. It may be that RDM and BICO are preferable for lighter riders and upper wind conditions."