Stick with the reference stance - that is already like .5" set back on the Raptor... so having it all the way back would be like 2" in reality. The board designers already considered what the best setback woudl be for you. You should not have any float issues with that 169 cm so I don't see the need to add additional setback.
For you wife, again... use the reference stance. 1.5" setup back is extremely and would only be good for deep powder riding and will be detrimental to any regular snowboarding she will be doing (i.e. don't do it!)
I believe the setback on the Raptor is actually 0.75" to 1.25" (depending on whether you look at setback relative to board length or effective edge/sidecut).
Agree that pretty much anything over 1" is already VERY directional freeride oriented and 1.5" generally makes no sense for anything but deep pow.
Last edited by hktrdr; 12-12-2012 at 08:45 PM.