The skin is definitely trimmed flush with the outboard edge of the Tip rib flange. Reference the drawings, the manual is a loose set of instructions. The -6 is very similar but the forward 1/3 or so of the fibreglass tip is fixed to the H/S, the rest aft is fixed to the elevator and mass balanced. The -4 has the entire tip on the Elevator.
2017 VAF dues happily paid, Thanks DR!