Originally Posted by
jayp410
While I haven't measured or checked the titanium hanger pocket with tools, visually it looks dead flat...it's CNC machined with impressive precision. The edges look square (90 degrees). I would be completely shocked if the frame itself is the problem.
The aluminum hanger on the other hand has obvious curvature on the mating face, so I suspect it's responsible for all of the gap in the picture.
I may try filling the gap with auto body filler while waiting for the new hanger to arrive...it might save a week of waiting. The only thing is, it might be a pain to scrape that stuff off (although I hear a propane torch can be used to remove it).
Since the frame looks good, I'd go slow before risking turning a minor problem (bent replaceable part) worse, by possibly messing up the frame pocket. I'd either wait, or work on the hanger, since there's nothing to lose that way.
Try the emory cloth. You'll be amazed at how fast it goes and it's easy to keep the part flat simply by pressing in the middle, and sanding with a circular motion. If you have a glass table top, work there, otherwise a kitchen counter is good enough for the job. Start with course grit, and finish with medium. You're not making it beautiful, only flat. And you don't have to get it totally flat, only establish a decent surface in the between and around the two mounting bolts. Later you can get a new hanger, get 2 one for immediate use and a second as a spare.
If you decide to use filler, smear a film of grease in the frame pocket, then line it with a piece of stretch wrap with two holes punched. Also be sure to grease the two bolts and the thread of the plate so nothing will stick. Later most, if not all, the body filler should release nicely from the frame, and require only minor clean up if any.
Be sure to let it set and cure completely before squaring up the hanger, lest you squeeze partly set filler out and have to start anew.
BTW- you don't need a stainless hanger, the aluminum one is sufficiently strong and rigid for it's job. You just need a flat one, so wheel pressure doesn't move it.