I've read all the post in reguards to tying the 2 racks together so they don't move. I saw the bracket "tinman" made when he was making his. Has anybody come up with away to tie the 2 bagsupports together? The strap that comes with them goes over the seat but doesn't really secure the supports, they still flap around. From what I see is they need something pulling them together on the bottom, any ideas?