For me it's not so much a need for a longer bolt, I just find it very awkward to work with the (upside down) bolt and lock washer, as is. It's just so much easier to place rings over a stud and then fasten things down with a nut. (I guess I'm somewhat of a spaz too, in that regard! lol)
Where I am lacking space for enough rings is on the pos terminal stud. When I switched to the heavy duty rings, I found I could barely get two battery cables and a few thin rings on the stud, and that's using a shallow nut. So now I'm considering my options for that, as well. I will need to hook up 3 heavy duty rings and at least a half a dozen thin rings.