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While under there I noticed there were two mounting studs: (A) was brazed/welded on and (B) was embedded. Am guessing (B) was for a chain tube mount on the other side?? Which doesn't make sense. But what is (A)'s purpose? Idler mount??
Also, I removed the adjustment screws and made sure there was Loctite on the threads, which there were. I must of done that once, but I made sure there was today too. On the middle point there was maybe one thread with a slight tinge of brown there. So was guessing the braze-on (A) was a drain tube, but looks to be threaded.