I removed the rear tab, after the second time it cracked. I came up with a two piece rear mount that clamps on to the filler neck. I wanted to include a picture of this, but it just doesn't show up in a photo very well. Take steel tubing about the same size at the filler neck. Cut off a "ring" of it, approx 1/2" wide. Cut that ring into two halves. Fit them around the neck., and hold them on with a very thin hose clamp. I used one off of a BMW fork gaiter. Probably not much wider than 1/4", but fairly strong. You'll have to do a little grinding on the rings to get them to mount low on the tank. When you place them on the tank, you'll see what I mean. Once I had that in place, I made a bracket that came out to have a mounting hole exactly where the original tab mounted. Brazed that on to the rear half ring. So the whole thing clamps on to the tank - three parts - two halves of the ring, one with the tab attached to it - and the clamp. I've done two of these, and they have both held up very well. I even got a nod from a very well renowned British wrench when he saw it.
