That's probably not a bad way of putting it. Clearly Craig's pictures show a better solution which is probably the best you will get without completely remaking the rear of the cradle to the last incarnation.
I'd take the advice of the Project Binky boys and carry out, as they call it, a CAD exercise. Cardboard aided design!
Your photo of the left hand side shows how close the gearbox casing is to that wishbone mount. The nut is hidden behind part of the casing.