I used to have this one, but it is fundamentally flawed because the bag will bounce on the seems, in stead of on a side face. So I popped out the spring pin with a pin punch and took everything off except the inverted U. Then I machined out the holes to make them bigger, I used an angle grinder to modify the inner walls of the anchor shackle because it was slightly too narrow, then I slid along pin through everything, cut off the excess, and voila.

pics to come...


http://us.st12.yimg.com/us.st.yimg.c..._2032_45241250

http://us.st12.yimg.com/us.st.yimg.c..._2032_45201569