A joggle is real easy, not to mention it is as per drawings. To put a doubler on the inboard section would mean lots of field rivets and who knows what the structural ramifications are of doing so. I say stick to the drawing.Hello and Happy Valentine’s Day!
1) Doable as described above
2) Not doable due to stresses and would need a total re-engineering of the spar
3) Or, a joggle is no big deal to create and just stick to the original design.