This frame will require this little special cable hanger to clear the back side of the seat tube
I was instructed not to put housing mounts of any kind and that "he would be modifying it himself", but I doubt he'd weld an insert all the way through. Drilling a hole through the seat tube (below the top tube) would be a huge stress riser if not done properly- lots of twisting forces and tension in that spot. I had initially planned on using an adjuster screw, but I placed the hole too far down for it to work. The housing fits really snug in there and it should work well irregartless.