I made mine from 20 gauge, but mine's a large plate about the size of a number plate rather than two strips. It's slightly smaller than the toolbag so it's not visible, however because it's in front of the forks it allowed me to use a couple of "stick on" rubber feet. That braces it against the forks so it can't bounce "downwards" without scratching anything, and the weight of the tools keeps it from bouncing "upwards". I simply drilled some holes in the back of the toolbag and put some bolts with large washers through it so it's hard-mounted to the bracket.
Matt
