Just remembered.
Another possible solution to the fork clip is to mount it where the rack support is. This looks a definite possibility, but will reguire a longer threaded bolt,and possibly a washer between the support and the back of the clip. This is another idea that looks good ,but I have not around to trying it yet. let me know what you think.

Ps I just discovered I can lock the fold on my black bullbared bike. I can use the seat post clamp lever to press against the brake levers locking the bars against the wheel and the wheel against the frame.