Also keep in mind that the RSR Evo2 And RSS MkIII rig quite differently to the earlier RSR. The MkIII and Evo2 require less downhaul but the tack strap really needs to be cranked on to keep the power locked and down low. The sail should not be bagged in the same way as the older RSR unless deep off the wind or using bigger sails underpowered. I have 9.5 and 7.8 MkIII's and 7.0 Evo2 and am happy with the range vs price for the bigger sails. When it is stronger I am on the 7 and have the extra stability with the extra price.
Tuning tips for the MkIII are on the NP site - MkIII page.