Tried to fit between the frame and fender: impossible for more reasons than I care to list.
I'm moving forward with the rectifier bolts because it fits so darn perfect there. All I need to do is get some extra hardware to fasten the pillion seat and plate. Only modification needed was to snip some corners into the rear seat "lip." Seat is in dire condition anyways so had no issues doing some light plastic surgery
I know I was warned about potential fender warping, but if the fender can hold a pillion, and/or some luggage then I doubt a 10lb board will ruin it. I know the issue is more about the wind resistance/sail effect, but I am thinking of adding a pvc "arm" between the front of the frame and the nose of the board to counter that. I will be testing for alignment after initial test runs before going on any lengthy journey.
Couple pics of a test fit:
No I won't be using these tiny screws. Plan on getting longer bolts of matching thread and use a locking nut and washer with the bolt threaded from underneath to avoid tyre clearance issues.
Also the plate will likely be slid to the right. It was centered for me to mark the seat evenly before cutting into it.
Rear wheel's still off because I couldn't be crappity smacked to put it back on after testing fitment between frame and fender..