I bought the Sargent Seat and find it to be much more comfortable than stock. However, it wiggles loose when I hang off because the tabs that pin the seat in place on my '04 simply turn as the lateral pressure is applied to the seat. Plus there aren't grooves for those tabs to sit in like the stock seat, the Sargent just has metal tabs with rubber caps to keep it from sliding. Has anyone else ran into this problem and what can I do to correct it?