Joined: Feb 2012
Posts: 19,344
Likes: 5,462
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
I think the two frame issues are two different issues. And the component wear is another issue.
As long as there is no crash damage (head tube pushed back) and the DT dent is smooth without a crease i'd not be too woried about this. Yes understanding why this dent is there is interesting, but on line we won't be able to confirm much.
The rear end being out by 1/4" is no big deal. Again as long as there's no crash evidence. This amount of missalignment is easy to correct.
As far as the component wear goes I'd say that's your call. How much it all effects the function/reliability will be your assesment. This should not be hard to figure out. Andy.