RE: Welcome to Club SAITO !
I don't there has been any complaints about the 82 backplate. There may have been one a few years back, but it seems to be totally reliable. And, there is new one if you want it. I wouldn't worry about 82. Besides the new backplate that fits the 72 there are a couple of easy fixes for the flexing problem. I wouldn't part with either my 72 or 82.