Are all 3 joints leaking?....just one??? If the doughnuts are fresh and the spring-bolts are installed correctly the hardware works surprisingly well. Not to be a smart-a$$, but after similar experience with mine I have to ask; "are you sure that the leak is where you think it is?" My leak turned out to be a crack hidden under a heat-shield just inches away from where I was 100% certain it was.
Glenn