Ah ha! Invoking the Sixty-Fifth Perorgative I can thus use the Green/Green Lateral loop moving to Wood Green and jumping with the double twang bonus to Cockfosters.
Dropping Line Velocity to 1.5 from 15 with the intention of causing board rotation as a result of kick-back inertia. This should take me off on a diagonal and shift me to the adjoining paraboloid, hopefully leaving me resting at Harrow on the Hill with the rest of you in confusion.