ORIGINAL: aerowoof
zor,
when you are stacking the blanks all the ribs are stacked on the outside of the root rib.the tip rib needs to be on the outide of its pattern.
aerowoof,
You can put the tip rib on the outside if you wish. It will make no difference since all the ribs are not finished to the final airfoil until the wing is all assembled.
Zor